Some questions about the DDK.

[qingyuan0827]

Hi elder4p,

I face a problem when I am using DDK tools for RSA and I do not know how to resolve it.
At first, I want to add a new domain concept in ZML Component Connector diagram of ZMLMM model, and using the DDK tools to generate ZMLMM.uml, ZMLMM.properties, ZMLMM.zdlgen and ZML.profile.uml, and I`ve finish to add the Gen Palette and Menu Model of ZMLMM.zdlgen file.
These kinds of files are using in a study model project named A for generate a new file which named A.profile.uml. But I got a failure with NullpointerException, and I cannot generate a A.profile.uml from A.zdlgen file.

I`ll show you the log of this problem, could you please help me with this problem?
Many thanks,

The words below are the whole information in this log. Hope you can give me some advice after you see this.

Log:
Error
Tue Aug 01 16:11:36 CST 2023
Uncaught exception in workflow: java.lang.NullPointerException

org.eclipse.emf.mwe.core.WorkflowInterruptedException: java.lang.NullPointerException
at org.eclipse.xtend.expression.AbstractExpressionsUsingWorkflowComponent.invokeInternal(AbstractExpressionsUsingWorkflowComponent.java:247)
at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:126)
at org.eclipse.emf.mwe.core.container.CompositeComponent.internalInvoke(CompositeComponent.java:104)
at org.eclipse.emf.mwe.core.container.CompositeComponent.invoke(CompositeComponent.java:89)
at com.zeligsoft.base.util.WorkflowUtil.executeWorkflow(WorkflowUtil.java:138)
at com.zeligsoft.ddk.zdlgen2umlprofile.operations.GenerateOperation.run(GenerateOperation.java:89)
at com.zeligsoft.ddk.zdlgen2umlprofile.ui.actions.GenerateProfilePopupAction$1.execute(GenerateProfilePopupAction.java:177)
at org.eclipse.ui.actions.WorkspaceModifyOperation$1.run(WorkspaceModifyOperation.java:106)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2344)
at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:118)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)