org.eclipse.m2m.atl.engine.emfvm.VMException: Feature eStructuralFeatures does not exist on EReference
<native>
	at __applyRefiningTrace__#41(mult.atl)
		local variables: self=mult : ASMModule
	at main#50(mult.atl)
		local variables: self=mult : ASMModule

module mult;
create OUT : ecore refining IN : ecore;

-- Returns true if self and self.opposite constitute a many to many relation,
-- false otherwise
helper context ecore!EReference def : isManyToMany : Boolean =
	if (not self.eOpposite.oclIsUndefined()) then
		self.isMany and self.eOpposite.isMany
	else
		false
	endif;

-- Returns true if self has a lowerbound of 0 and an upperbound of *
helper context ecore!EReference def : isMany : Boolean =
	self.lowerBound = 0 and self.upperBound < 0;

rule association {
	from
		refA: ecore!EReference,
		refB: ecore!EReference,
		inputClassA: ecore!EClass,
		inputClassB: ecore!EClass (
			refA.eOpposite = refB and
			refA.isManyToMany and
			refA.eReferenceType = inputClassA and
			refB.eReferenceType = inputClassB
		)
	to
		outputClassA : ecore!EClass (
			name <- inputClassA.name,
			eStructuralFeatures <- outputRefAC
		),
		
		outputClassB : ecore!EClass (
			name <- inputClassB.name,
			eStructuralFeatures <- outputRefBC
		),
		
		outputClassC : ecore!EClass (
			name <- inputClassA.name->concat(inputClassB.name),
			eStructuralFeatures <- outputRefCA,
			eStructuralFeatures <- outputRefCB
		),
		
		outputRefAC : ecore!EReference (
			name <- refA.name,
			lowerBound <- 1,
			upperBound <- 1,
			eType <- outputClassA,
			eOpposite <- outputRefCA
		),
		
		outputRefCA : ecore!EReference (
			name <- refA.name + '1',
			lowerBound <- 0,
			upperBound <- 0-1,
			eType <- outputClassC,
			eOpposite <- outputRefAC
		),
		
		outputRefBC : ecore!EReference (
			name <- refB.name,
			lowerBound <- 1,
			upperBound <- 1,
			eType <- outputClassB,
			eOpposite <- outputRefCB
		),
		
		outputRefCB : ecore!EReference (
			name <- refB.name + '1',
			lowerBound <- 0,
			upperBound <- 0-1,
			eType <- outputClassC,
			eOpposite <- outputRefBC
		)
}

to
		outputRefA : ecore!EReference(),
		outputClassA : ecore!EClass (
			name <- inputClassA.name,
			eStructuralFeatures <- outputRefAC
		),