GOTCHA: MagicDraw/Cameo: SysMLv1/UML: If you can extract model info using an OpaqueBehavior and you can see that in the Evaluation Mode in the Expression Editor it might not appear in a column in the Generic Table Diagram because the final Type is not set

In some cases the final Type must be set correctly on the Expression Editor in order to see a result displayed on a table column, even if you can see results fine in Evaluation Mode.

[Under the hood there is some translation going on required to display the results in table columns. If you want to see the gory details, try a Groovy script directly in the Expression Editor and interrogate in Evaluation Mode mode with the Java .class of each stage; you'll see that there are MagicDraw specific and ECore wrapper classes used.]

In the example shown, a (not so pretty) Groovy script was used to convert the text 'Id' to an Integer 'Id' (for use in an Excel export):

arg1.getOwnedElement()[1].getValue()[0].toInteger()

In Evaluation Mode against a test Requirement the integer id could be seen fine. But with the Type left open as it did not display on the column. Setting the Type to the explicit UML Integer primitive was required to make it display in the column.