It sounds strange though it's embarrassing.
I have a class with ClassMethods written in ISOS and Embedded Python.
The ClassMethods written in ISOS start in the Background as usual. No problems
But my
ClassMethod setPy() [ Language = python ]
{
import iris, datetime, time
- - -Just fails the JOB command with (even 15 sec) timeout and $ZC=0
This is not funny
My actual workaround:
I created a ClassMethod in ISOS, that does an elegant JobStart
and this ClassMethod only runs the Embedded Python ClassMethod.

