The attached process was created with the new process designer. If user tries to migrate this process, he is not successful. The old designer will open the migrated process in xml editor. This issue is caused by complex completion condition (used logical operators &&, ||).

Reproducer

org.kie.workbench.common.stunner.bpmn.backend.service.diagram.marshalling.subprocesses.MultiInstanceSubProcessTest

Acceptance test

Try to migrate process, where MI subprocess has fields:

• name: <!@?>
• documentation: 式
• input collection: some var
• output collection: some var
• input: some var
• output: some var
• completion condition: a.size() == 0 && b.size() > 0 || KieFunctions.isNull(c)