Unable to launch player piano from Cameo Systems Modeler 2021x

[yeoleparesh]

MagicDraw cannot execute the Groovy macro, please make sure that the C:\Users\yeole.paresh\rapid-modeling-tools\player-piano\player-piano-script.groovy is correct. startup failed: C:\Users\yeole.paresh\rapid-modeling-tools\player-piano\player-piano-script.groovy: 142: unable to resolve class JsonSlurper @ line 142, column 18. jsonSlurper = new JsonSlurper(); ^ 1 error org.codehaus.groovy.control.MultipleCompilationErrorsException

[shaneconnelly23]

We were unable to recreate your error. Please try again with the updated main branch and provide instructions to recreate your error, should it persist.

[tbsgt]

I was able to reproduce this. It impacts Cameo 2021xR2, but not Cameo 2021xR1 or 190sp4. The root cause is a change in the Groovy distribution that ships with Cameo. In 190sp4 and 2021xR1, I see

<library name="lib/engines/groovy-2.4.15/embeddable/groovy-all-2.4.15.jar"/>

but in 2021xR2 it's

<library name="lib/engines/groovy-3.0.7/lib/groovy-jsr223-3.0.7.jar"/>
<library name="lib/engines/groovy-3.0.7/lib/groovy-3.0.7.jar"/>

Groovy has taken a more modular approach since 2.0 according to the release notes so Cameo would need to reference either the groovy-all-*.jar distribution or specifically import groovy-json-*.jar.

I'm going to make a pull request to update the documentation with a fix:

• Download https://repo1.maven.org/maven2/org/codehaus/groovy/groovy-json/3.0.7/groovy-json-3.0.7.jar to plugins\com.nomagic.magicdraw.automaton\lib\engines\groovy-3.0.7\lib
• Add the following line to plugins\com.nomagic.magicdraw.automaton\plugin.xml:
  <library name="lib/engines/groovy-3.0.7/lib/groovy-json-3.0.7.jar"/>

Your Cameo configurations may differ from mine, but I hope the approach helps!