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Home » Modeling » Papyrus » Can't Add Trace to SysML Requirement(Trace controls are greyed out in properties panel for Requirement)
Can't Add Trace to SysML Requirement [message #1122459] Tue, 01 October 2013 15:46 Go to next message
David Hetherington is currently offline David HetheringtonFriend
Messages: 8
Registered: May 2013
Location: Austin, TX
Junior Member
I am trying to trace a requirement back to a use case. Very similar
to Figure 12.20 of Friedenthal's "A Practical Guide to SysML" book.

In order to isolate the problem, I created a fresh SysML project in an
empty directory and asked for a requirements diagram as the first diagram.
I then selected a requirement from the palette and dragged it onto the diagram.

So far so good.

Next I created a use case diagram and a simple use case.

Now, returning to the requirements diagram, I want to add a <<trace>> relationship
relating the requirement to the use case. However, when I select the requirement,
all the SysML properties controls such as "Derived", "Traced", "Satisfied by" are all greyed out.

Also, the palette does not offer an edge for "Trace" which it really should)


Any suggestions?


David Hetherington

David Hetherington
Re: Can't Add Trace to SysML Requirement [message #1747926 is a reply to message #1122459] Wed, 16 November 2016 20:46 Go to previous messageGo to next message
Nathan Adams is currently offline Nathan AdamsFriend
Messages: 3
Registered: June 2013
Junior Member
See (and vote for) this bug:
Re: Can't Add Trace to SysML Requirement [message #1748616 is a reply to message #1747926] Fri, 25 November 2016 09:48 Go to previous messageGo to next message
Klaas Gadeyne is currently offline Klaas GadeyneFriend
Messages: 165
Registered: July 2009
Senior Member
Hi Nathan,

Out of curiosity: Is there a reason for you not to use the new SysML 1.4 editors in which you can create a trace relationship via the "Edges" in the palette?
Re: Can't Add Trace to SysML Requirement [message #1750145 is a reply to message #1748616] Fri, 16 December 2016 11:16 Go to previous message
Patrick Tessier is currently offline Patrick TessierFriend
Messages: 238
Registered: July 2009
Location: Paris Saclay, France
Senior Member
Hi, the "traced to" fied is readonly in SysML exactly as "sastisfied by" and "verified by".
This fields are automatically computed by adding elements in the model.

For the field "traced to" you need to add a dependency stereotyped "trace" between you requirement and you other element.
For "satisfied by" you need add a "satisfy" link between you requirement and your block
For "verified by" this a "verify" link.
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