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Home » Modeling » TMF (Xtext) » Error creating PDA for syntactic sequencer (2.29.0)
Error creating PDA for syntactic sequencer (2.29.0) [message #1856115] Tue, 22 November 2022 11:25 Go to next message
Sebastian Waldhauser is currently offline Sebastian WaldhauserFriend
Messages: 11
Registered: March 2022
Junior Member
Hi,

I have three grammars: Base.xtext, Base2.xtext, Mydsl.xtext

Base.xtext
grammar org.xtext.example.Base with org.eclipse.xtext.common.Terminals

generate myBase "http://www.xtext.org/example/base/MyBase"

Basic:
	name=ID
;

KEYWORDID:
	ID | "foo"
;


Base2.xtext
grammar org.xtext.example.Base2 with org.xtext.example.Base

generate myBase2 "http://www.xtext.org/example/base/MyBase2"

Basic2:
	name=ID
;

KEYWORDID2:
	ID | "foo"
;


Mydsl.xtext
grammar org.xtext.example.dsl.Mydsl with org.xtext.example.Base2

generate myDsl "http://www.xtext.org/example/dsl/MyDsl"

Model:
	greetings+=Greeting*;
	
Greeting:
	'Hello' name=KEYWORDID lastname=ID '!';


The Mydsl grammar depends on Base2 and Base: Mydsl -with-> Base2 -with-> Base.
While executing the mwe2 workflow for the Mydsl grammar, I get the following error:
1137 ERROR SyntacticSequencerPDAProvider - Error creating PDA for syntactic sequencer for contexts: Basic2 returns Basic2: no type found for name=unresolved_rule
java.lang.RuntimeException: no type found for name=unresolved_rule
        at org.eclipse.xtext.serializer.analysis.SyntacticSequencerPDAProvider.getType(SyntacticSequencerPDAProvider.java:703)
        at org.eclipse.xtext.serializer.analysis.SyntacticSequencerPDAProvider.createAbsorberState(SyntacticSequencerPDAProvider.java:564)
        at org.eclipse.xtext.serializer.analysis.SyntacticSequencerPDAProvider.createAbsorberState(SyntacticSequencerPDAProvider.java:569)
        at org.eclipse.xtext.serializer.analysis.SyntacticSequencerPDAProvider.getSyntacticSequencerPDAs(SyntacticSequencerPDAProvider.java:631)
        at org.eclipse.xtext.serializer.analysis.SemanticSequencerNfaProvider.getSemanticSequencerNFAs(SemanticSequencerNfaProvider.java:240)
        at org.eclipse.xtext.serializer.analysis.GrammarConstraintProvider.getConstraints(GrammarConstraintProvider.java:624)
        at org.eclipse.xtext.xtext.generator.serializer.SemanticSequencerExtensions.getGrammarConstraints(SemanticSequencerExtensions.java:112)
        at org.eclipse.xtext.xtext.generator.serializer.SerializerFragment2.generateAbstractSemanticSequencer(SerializerFragment2.java:417)
        at org.eclipse.xtext.xtext.generator.serializer.SerializerFragment2.generate(SerializerFragment2.java:211)
        at org.eclipse.xtext.xtext.generator.CompositeGeneratorFragment2.generate(CompositeGeneratorFragment2.java:43)
        at org.eclipse.xtext.xtext.generator.XtextGenerator.invokeInternal(XtextGenerator.java:228)
        at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:133)
        at org.eclipse.emf.mwe.core.lib.Mwe2Bridge.invoke(Mwe2Bridge.java:35)
        at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:213)
        at org.eclipse.emf.mwe2.runtime.workflow.AbstractCompositeWorkflowComponent.invoke(AbstractCompositeWorkflowComponent.java:38)
        at org.eclipse.emf.mwe2.runtime.workflow.Workflow.run(Workflow.java:21)
        at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:103)
        at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:63)
        at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:53)
        at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.run(Mwe2Launcher.java:78)
        at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.main(Mwe2Launcher.java:36)
        at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:254)
        at java.base/java.lang.Thread.run(Thread.java:829)
1142 ERROR SyntacticSequencerPDAProvider - Error creating PDA for syntactic sequencer for contexts: KEYWORDID2 returns null: no type found for unresolved_rule
java.lang.RuntimeException: no type found for unresolved_rule
        at org.eclipse.xtext.serializer.analysis.SyntacticSequencerPDAProvider.getType(SyntacticSequencerPDAProvider.java:703)
        at org.eclipse.xtext.serializer.analysis.SyntacticSequencerPDAProvider.createEmitterStates(SyntacticSequencerPDAProvider.java:605)
        at org.eclipse.xtext.serializer.analysis.SyntacticSequencerPDAProvider.createAbsorberState(SyntacticSequencerPDAProvider.java:574)
        at org.eclipse.xtext.serializer.analysis.SyntacticSequencerPDAProvider.getSyntacticSequencerPDAs(SyntacticSequencerPDAProvider.java:631)
        at org.eclipse.xtext.serializer.analysis.SemanticSequencerNfaProvider.getSemanticSequencerNFAs(SemanticSequencerNfaProvider.java:240)
        at org.eclipse.xtext.serializer.analysis.GrammarConstraintProvider.getConstraints(GrammarConstraintProvider.java:624)
        at org.eclipse.xtext.xtext.generator.serializer.SemanticSequencerExtensions.getGrammarConstraints(SemanticSequencerExtensions.java:112)
        at org.eclipse.xtext.xtext.generator.serializer.SerializerFragment2.generateAbstractSemanticSequencer(SerializerFragment2.java:417)
        at org.eclipse.xtext.xtext.generator.serializer.SerializerFragment2.generate(SerializerFragment2.java:211)
        at org.eclipse.xtext.xtext.generator.CompositeGeneratorFragment2.generate(CompositeGeneratorFragment2.java:43)
        at org.eclipse.xtext.xtext.generator.XtextGenerator.invokeInternal(XtextGenerator.java:228)
        at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:133)
        at org.eclipse.emf.mwe.core.lib.Mwe2Bridge.invoke(Mwe2Bridge.java:35)
        at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:213)
        at org.eclipse.emf.mwe2.runtime.workflow.AbstractCompositeWorkflowComponent.invoke(AbstractCompositeWorkflowComponent.java:38)
        at org.eclipse.emf.mwe2.runtime.workflow.Workflow.run(Workflow.java:21)
        at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:103)
        at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:63)
        at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:53)
        at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.run(Mwe2Launcher.java:78)
        at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.main(Mwe2Launcher.java:36)
        at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:254)
        at java.base/java.lang.Thread.run(Thread.java:829)


Worked with 2.18.0.

I'd be thankful for any ideas.

Best regards,
Sebastian

[Updated on: Tue, 22 November 2022 11:28]

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856116 is a reply to message #1856115] Tue, 22 November 2022 11:46 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
Messages: 14496
Registered: July 2009
Senior Member
hi, can you please provide a complete reproducing project

i assume this is a bug in org.eclipse.xtext.xtext.FlattenedGrammarAccess.FlattenedGrammarAccess(RuleNames, RuleFilter)
but i dont know this part of the code

maybe the problem is also that the gramamr file names and the language names are not in sync. is that intentional?

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[Updated on: Tue, 22 November 2022 12:46]

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856118 is a reply to message #1856116] Tue, 22 November 2022 13:04 Go to previous messageGo to next message
Sebastian Waldhauser is currently offline Sebastian WaldhauserFriend
Messages: 11
Registered: March 2022
Junior Member
Hi Christian,

thank you for your quick reply.
Please find the example project in the attachments.

I fixed the language and file names and its still reproducible.

Best regards,
Sebastian

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856120 is a reply to message #1856118] Tue, 22 November 2022 13:42 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
Messages: 14496
Registered: July 2009
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is there a reason why you have 3 workflows?

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856121 is a reply to message #1856120] Tue, 22 November 2022 13:45 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
Messages: 14496
Registered: July 2009
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and with naming i meant

org.xtext.example.base.Base

org.xtext.example.base2.Base2

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856122 is a reply to message #1856120] Tue, 22 November 2022 13:56 Go to previous messageGo to next message
Sebastian Waldhauser is currently offline Sebastian WaldhauserFriend
Messages: 11
Registered: March 2022
Junior Member
I'm currently not aware of any reason why we use multiple workflows.

Im not sure, if I follow you correctly. How are the names not in sync?

[Updated on: Tue, 22 November 2022 13:58]

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856123 is a reply to message #1856122] Tue, 22 November 2022 14:00 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
Messages: 14496
Registered: July 2009
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the org.xtext.example.Base language is in package org.xtext.example.base and has name Base
=> qualified name and location in package dont match.
=> if i rename them in the xtext file to include right package it works for me

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[Updated on: Tue, 22 November 2022 14:01]

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856124 is a reply to message #1856123] Tue, 22 November 2022 14:11 Go to previous messageGo to next message
Sebastian Waldhauser is currently offline Sebastian WaldhauserFriend
Messages: 11
Registered: March 2022
Junior Member
Ok, I get it now, thank you.
I have now:
grammar org.xtext.example.base.Base
grammar org.xtext.example.base2.Base2
grammar org.xtext.example.mydsl.MyDsl

And also changed the language names in the workflows accordingly. However, I still get the same error.

[Updated on: Tue, 22 November 2022 14:13]

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856126 is a reply to message #1856124] Tue, 22 November 2022 14:37 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
Messages: 14496
Registered: July 2009
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hmmm i dont.
  • Attachment: export.zip
    (Size: 1.60MB, Downloaded 26 times)


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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856127 is a reply to message #1856126] Tue, 22 November 2022 15:02 Go to previous messageGo to next message
Sebastian Waldhauser is currently offline Sebastian WaldhauserFriend
Messages: 11
Registered: March 2022
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I replaced my directory with yours and still got the same error.

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856129 is a reply to message #1856127] Tue, 22 November 2022 15:28 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
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Registered: July 2009
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i will try on 2nd machine. what steps do you do to reproduce?

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856130 is a reply to message #1856129] Tue, 22 November 2022 15:37 Go to previous messageGo to next message
Sebastian Waldhauser is currently offline Sebastian WaldhauserFriend
Messages: 11
Registered: March 2022
Junior Member
Thank you.

I just deleted the directory and copied yours. Then I ran mvnw clean install in the parent project.

Concerning the original project:
1) Create new Xtext project
2) create the packages base and base2 and populate them with the grammars/workflows as discussed ("names in sync").
3) Adapt the mydsl workflow (StandaloneSetup and referencedResource)
4) Adapt the pom.xml of the mydsl project
- a) copy the <configuration> of the workflow into the <execution> block of the mydsl workflow
- b) copy and adapt the execution block for each additional workflow
5) run mvnw clean install in the parent project

[Updated on: Tue, 22 November 2022 15:40]

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856131 is a reply to message #1856130] Tue, 22 November 2022 15:41 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
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Registered: July 2009
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so the problem is the maven and not from eclipse.
i am not sure if 3 workflows is a good idea from maven
also standalonesetup is a bad idea

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[Updated on: Tue, 22 November 2022 15:42]

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856132 is a reply to message #1856131] Tue, 22 November 2022 15:46 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
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can you try this workflow instead

module org.xtext.example.mydsl.GenerateMyDsl

import org.eclipse.xtext.xtext.generator.*
import org.eclipse.xtext.xtext.generator.model.project.*

var rootPath = ".."

Workflow {
	component = XtextGenerator {
		cleaner = {
			enabled = false
		}
		configuration = {
			project = StandardProjectConfig {
				baseName = "org.xtext.example.mydsl"
				rootPath = rootPath
				runtimeTest = {
					enabled = true
				}
				eclipsePlugin = {
					enabled = true
				}
				eclipsePluginTest = {
					enabled = true
				}
				createEclipseMetaData = true
			}
			code = {
				encoding = "UTF-8"
				lineDelimiter = "\r\n"
				fileHeader = "/*\n * generated by Xtext \${version}\n */"
				preferXtendStubs = false
			}
		}
		language = StandardLanguage {
			name = "org.xtext.example.base.Base"
			fileExtensions = "base"
			serializer = {
				generateStub = false
			}
			validator = {
				// composedCheck = "org.eclipse.xtext.validation.NamesAreUniqueValidator"
				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
				generateDeprecationValidation = true
			}
			generator = {
				generateXtendStub = true
			}
			junitSupport = {
				junitVersion = "5"
			}
		}
		language = StandardLanguage {
			name = "org.xtext.example.base2.Base2"
			fileExtensions = "base2"
            referencedResource = "platform:/resource/org.xtext.example.mydsl/src/org/xtext/example/base2/Base2.xtext"
			serializer = {
				generateStub = false
			}
			validator = {
				// composedCheck = "org.eclipse.xtext.validation.NamesAreUniqueValidator"
				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
				generateDeprecationValidation = true
			}
			generator = {
				generateXtendStub = true
			}
			junitSupport = {
				junitVersion = "5"
			}
		}
		language = StandardLanguage {
			name = "org.xtext.example.mydsl.MyDsl"
			fileExtensions = "mydsl"
			referencedResource = "platform:/resource/org.xtext.example.mydsl/src/org/xtext/example/base/Base.xtext"
            referencedResource = "platform:/resource/org.xtext.example.mydsl/src/org/xtext/example/base2/Base2.xtext"
			serializer = {
				generateStub = false
			}
			validator = {
				// composedCheck = "org.eclipse.xtext.validation.NamesAreUniqueValidator"
				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
				generateDeprecationValidation = true
			}
			generator = {
				generateXtendStub = true
			}
			junitSupport = {
				junitVersion = "5"
			}
		}
	}
}


might be needed to replace platform resource with classpath for maven

module org.xtext.example.mydsl.GenerateMyDsl

import org.eclipse.xtext.xtext.generator.*
import org.eclipse.xtext.xtext.generator.model.project.*

var rootPath = ".."

Workflow {
	component = XtextGenerator {
		cleaner = {
			enabled = false
		}
		configuration = {
			project = StandardProjectConfig {
				baseName = "org.xtext.example.mydsl"
				rootPath = rootPath
				runtimeTest = {
					enabled = true
				}
				eclipsePlugin = {
					enabled = true
				}
				eclipsePluginTest = {
					enabled = true
				}
				createEclipseMetaData = true
			}
			code = {
				encoding = "UTF-8"
				lineDelimiter = "\r\n"
				fileHeader = "/*\n * generated by Xtext \${version}\n */"
				preferXtendStubs = false
			}
		}
		language = StandardLanguage {
			name = "org.xtext.example.base.Base"
			fileExtensions = "base"
			serializer = {
				generateStub = false
			}
			validator = {
				// composedCheck = "org.eclipse.xtext.validation.NamesAreUniqueValidator"
				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
				generateDeprecationValidation = true
			}
			generator = {
				generateXtendStub = true
			}
			junitSupport = {
				junitVersion = "5"
			}
		}
		language = StandardLanguage {
			name = "org.xtext.example.base2.Base2"
			fileExtensions = "base2"
            referencedResource = "classpath:/org/xtext/example/base2/Base2.xtext"
			serializer = {
				generateStub = false
			}
			validator = {
				// composedCheck = "org.eclipse.xtext.validation.NamesAreUniqueValidator"
				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
				generateDeprecationValidation = true
			}
			generator = {
				generateXtendStub = true
			}
			junitSupport = {
				junitVersion = "5"
			}
		}
		language = StandardLanguage {
			name = "org.xtext.example.mydsl.MyDsl"
			fileExtensions = "mydsl"
			referencedResource = "classpath:/org/xtext/example/base/Base.xtext"
            referencedResource = "classpath:/org/xtext/example/base2/Base2.xtext"
			serializer = {
				generateStub = false
			}
			validator = {
				// composedCheck = "org.eclipse.xtext.validation.NamesAreUniqueValidator"
				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
				generateDeprecationValidation = true
			}
			generator = {
				generateXtendStub = true
			}
			junitSupport = {
				junitVersion = "5"
			}
		}
	}
}


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[Updated on: Tue, 22 November 2022 15:49]

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856133 is a reply to message #1856131] Tue, 22 November 2022 15:48 Go to previous messageGo to next message
Sebastian Waldhauser is currently offline Sebastian WaldhauserFriend
Messages: 11
Registered: March 2022
Junior Member
Ok, I will merge the workflows into one.
AFAIK I need the StandaloneSetup for registerGenModelFile and registerGeneratedEPackage.

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856134 is a reply to message #1856133] Tue, 22 November 2022 15:53 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
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Registered: July 2009
Senior Member
besides that i have no clue why it does not resolve from maven.

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856135 is a reply to message #1856126] Tue, 22 November 2022 16:01 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
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this is the wf that works for me from eclipse

module org.xtext.example.mydsl.GenerateMyDsl

import org.eclipse.xtext.xtext.generator.*
import org.eclipse.xtext.xtext.generator.model.project.*

var rootPath = ".."

Workflow {
	bean = org.eclipse.emf.mwe.utils.StandaloneSetup {
		platformUri = ".."
		registerGenModelFile = "platform:/resource/org.xtext.example.mydsl/model/generated/Base.genmodel"
		registerGenModelFile = "platform:/resource/org.xtext.example.mydsl/model/generated/Base2.genmodel"
	}
	component = XtextGenerator {
		cleaner = {
			enabled = false
		}
		configuration = {
			project = StandardProjectConfig {
				baseName = "org.xtext.example.mydsl"
				rootPath = rootPath
				runtimeTest = {
					enabled = true
				}
				eclipsePlugin = {
					enabled = true
				}
				eclipsePluginTest = {
					enabled = true
				}
				createEclipseMetaData = true
			}
			code = {
				encoding = "UTF-8"
				lineDelimiter = "\r\n"
				fileHeader = "/*\n * generated by Xtext \${version}\n */"
				preferXtendStubs = false
			}
		}
		language = StandardLanguage {
			name = "org.xtext.example.mydsl.MyDsl"
			fileExtensions = "mydsl"
			referencedResource = "platform:/resource/org.xtext.example.mydsl/src/org/xtext/example/base/Base.xtext"
            referencedResource = "platform:/resource/org.xtext.example.mydsl/src/org/xtext/example/base2/Base2.xtext"
			serializer = {
				generateStub = false
			}
			validator = {
				// composedCheck = "org.eclipse.xtext.validation.NamesAreUniqueValidator"
				// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
				generateDeprecationValidation = true
			}
			generator = {
				generateXtendStub = true
			}
			junitSupport = {
				junitVersion = "5"
			}
		}
	}
}


(in your project)

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856136 is a reply to message #1856134] Tue, 22 November 2022 16:02 Go to previous messageGo to next message
Sebastian Waldhauser is currently offline Sebastian WaldhauserFriend
Messages: 11
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Maven is unable to resolve the referencedResource with both versions of the workflow.

Concerning the original problem: It only occurs if three grammars are present in the hierarchy. For example, it works with two.

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856137 is a reply to message #1856136] Tue, 22 November 2022 16:10 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
Messages: 14496
Registered: July 2009
Senior Member
i am clueless. the last time i tried something like this is some time ago
and i dont know the internals of the resolve work.

maybe you can create an issue at xtext-core and ping @szarnekow

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856139 is a reply to message #1856137] Tue, 22 November 2022 16:35 Go to previous messageGo to next message
Sebastian Waldhauser is currently offline Sebastian WaldhauserFriend
Messages: 11
Registered: March 2022
Junior Member
Ok, thank you!

https://github.com/eclipse/xtext-core/issues/2028

I also found that when .antlr-generator-3.2.0-patch.jar is present in the project, the maven workflow has issues resolving the Base.genmodel for the Base2 workflow.

[Updated on: Tue, 22 November 2022 16:58]

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Re: Error creating PDA for syntactic sequencer (2.29.0) [message #1856249 is a reply to message #1856139] Tue, 29 November 2022 15:15 Go to previous message
Sebastian Waldhauser is currently offline Sebastian WaldhauserFriend
Messages: 11
Registered: March 2022
Junior Member
A solution can be found in the comments of the linked GitHub issue.

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