??? fix OMCSessionCmd for OMCSessionZMQ (v400)

Author: syntron

OMPython/OMCSession.py

@@ -72,7 +72,7 @@ class OMCSessionCmd:
     """
 
     def __init__(self, session: OMSessionABC, readonly: bool = False):
-        if not isinstance(session, OMSessionABC):
+        if not isinstance(session, (OMSessionABC, OMCSessionZMQ)):
             raise OMCSessionException("Invalid OMC process definition!")
         self._session = session
         self._readonly = readonly