[Zope] More about problems between 2-3-1 and 2-4-3

[Ronald L. Chichester]

When I use python scripts created under Zope 2-3-1, I get an
informational message:

PROBLEM (100) Script (Python) Object "my_script_name" needs to be
recompiled.


... Is that why my code written in Zope 2-3-1 doesn't work properly in
Zope 2-4-3?

If so, how do I recompile?

Thanks in advance,

Ron