Error when using xcore model

[magick93]

Hello

Xtext version 2.12.0

When I try to create a maven xtext project that uses a xcore model I get the following error:

591  [org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.main()] ERROR textGeneratorResourceSetInitializer  - Couldn't initialize Xcore support. Is it on the classpath?
594  [org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.main()] ERROR textGeneratorResourceSetInitializer  - Could not load XcoreLang.xcore.
org.eclipse.emf.ecore.resource.impl.ResourceSetImpl$1DiagnosticWrappedException: java.io.IOException: The path '/org.eclipse.emf.ecore.xcore.lib/model/XcoreLang.xcore' is unmapped
	at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.handleDemandLoadException(ResourceSetImpl.java:319)
	at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoadHelper(ResourceSetImpl.java:278)
	at org.eclipse.xtext.resource.XtextResourceSet.getResource(XtextResourceSet.java:265)
	at org.eclipse.xtext.xtext.generator.XtextGeneratorResourceSetInitializer.ensureResourceCanBeLoaded(XtextGeneratorResourceSetInitializer.java:120)
	at org.eclipse.xtext.xtext.generator.XtextGeneratorResourceSetInitializer.loadResource(XtextGeneratorResourceSetInitializer.java:50)
	at org.eclipse.xtext.xtext.generator.XtextGeneratorResourceSetInitializer.lambda$initialize$0(XtextGeneratorResourceSetInitializer.java:41)
	at java.util.ArrayList.forEach(ArrayList.java:1249)
	at org.eclipse.xtext.xtext.generator.XtextGeneratorResourceSetInitializer.initialize(XtextGeneratorResourceSetInitializer.java:43)
	at org.eclipse.xtext.xtext.generator.XtextGeneratorLanguage.initialize(XtextGeneratorLanguage.java:219)
	at org.eclipse.xtext.xtext.generator.StandardLanguage.initialize(StandardLanguage.java:175)
	at org.eclipse.xtext.xtext.generator.XtextGenerator.initialize(XtextGenerator.java:185)
	at org.eclipse.xtext.xtext.generator.XtextGenerator.checkConfigurationInternal(XtextGenerator.java:139)
	at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent2.checkConfiguration(AbstractWorkflowComponent2.java:21)
	at org.eclipse.emf.mwe.core.lib.Mwe2Bridge.preInvoke(Mwe2Bridge.java:65)
	at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.preInvoke(AbstractWorkflowComponent.java:197)
	at org.eclipse.emf.mwe2.runtime.workflow.AbstractCompositeWorkflowComponent.preInvoke(AbstractCompositeWorkflowComponent.java:29)
	at org.eclipse.emf.mwe2.runtime.workflow.Workflow.run(Workflow.java:18)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:102)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:62)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:52)
	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 sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:293)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: The path '/org.eclipse.emf.ecore.xcore.lib/model/XcoreLang.xcore' is unmapped
	at org.eclipse.emf.ecore.resource.impl.PlatformResourceURIHandlerImpl.createInputStream(PlatformResourceURIHandlerImpl.java:535)
	at org.eclipse.emf.ecore.resource.impl.ExtensibleURIConverterImpl.createInputStream(ExtensibleURIConverterImpl.java:360)
	at org.eclipse.xtext.resource.XtextResourceSet$1.createInputStream(XtextResourceSet.java:298)
	at org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1269)
	at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoad(ResourceSetImpl.java:259)
	at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoadHelper(ResourceSetImpl.java:274)
	... 26 more
612  [org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.main()] ERROR mf.mwe2.launch.runtime.Mwe2Launcher  - Problems running workflow io.hughestech.drupals2i.GenerateDsl: java.io.IOException: The path '/test-models/model/testmodel.xcore' is unmapped
java.lang.RuntimeException: Problems running workflow io.hughestech.drupals2i.GenerateDsl: java.io.IOException: The path '/test-models/model/testmodel.xcore' is unmapped
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:104)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:62)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:52)
	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 sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:293)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.eclipse.emf.ecore.resource.impl.ResourceSetImpl$1DiagnosticWrappedException: java.io.IOException: The path '/test-models/model/testmodel.xcore' is unmapped
	at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.handleDemandLoadException(ResourceSetImpl.java:319)
	at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoadHelper(ResourceSetImpl.java:278)
	at org.eclipse.xtext.resource.XtextResourceSet.getResource(XtextResourceSet.java:265)
	at org.eclipse.xtext.xtext.generator.XtextGeneratorResourceSetInitializer.loadResource(XtextGeneratorResourceSetInitializer.java:51)
	at org.eclipse.xtext.xtext.generator.XtextGeneratorResourceSetInitializer.lambda$initialize$0(XtextGeneratorResourceSetInitializer.java:41)
	at java.util.ArrayList.forEach(ArrayList.java:1249)
	at org.eclipse.xtext.xtext.generator.XtextGeneratorResourceSetInitializer.initialize(XtextGeneratorResourceSetInitializer.java:43)
	at org.eclipse.xtext.xtext.generator.XtextGeneratorLanguage.initialize(XtextGeneratorLanguage.java:219)
	at org.eclipse.xtext.xtext.generator.StandardLanguage.initialize(StandardLanguage.java:175)
	at org.eclipse.xtext.xtext.generator.XtextGenerator.initialize(XtextGenerator.java:185)
	at org.eclipse.xtext.xtext.generator.XtextGenerator.checkConfigurationInternal(XtextGenerator.java:139)
	at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent2.checkConfiguration(AbstractWorkflowComponent2.java:21)
	at org.eclipse.emf.mwe.core.lib.Mwe2Bridge.preInvoke(Mwe2Bridge.java:65)
	at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.preInvoke(AbstractWorkflowComponent.java:197)
	at org.eclipse.emf.mwe2.runtime.workflow.AbstractCompositeWorkflowComponent.preInvoke(AbstractCompositeWorkflowComponent.java:29)
	at org.eclipse.emf.mwe2.runtime.workflow.Workflow.run(Workflow.java:18)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:102)
	... 10 more
Caused by: java.io.IOException: The path '/test-models/model/testmodel.xcore' is unmapped
	at org.eclipse.emf.ecore.resource.impl.PlatformResourceURIHandlerImpl.createInputStream(PlatformResourceURIHandlerImpl.java:535)
	at org.eclipse.emf.ecore.resource.impl.ExtensibleURIConverterImpl.createInputStream(ExtensibleURIConverterImpl.java:360)
	at org.eclipse.xtext.resource.XtextResourceSet$1.createInputStream(XtextResourceSet.java:298)
	at org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1269)
	at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoad(ResourceSetImpl.java:259)
	at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoadHelper(ResourceSetImpl.java:274)
	... 25 more

[cdietrich]

is the test-models project on the classpath?

[magick93]

Yes

[cdietrich]

can you please share a minimal reproducing example. on my side this worked fine:
https://github.com/cdietrich/xtext-ecore-xcore/blob/master/org.xtext.example.mydsla/src/org/xtext/example/mydsla/GenerateMyDslA.mwe2