During the implementation of an Exception Action to Send an SNMP Trap and Email, these messages were received in the Datacollector:
DBG02216E DA11 13:19:50 Invalid thread group type.
DBG39054E DA11 13:19:50 Initialization of thread groups failed
Release : 20.0
Instead of using parm THREAD-GROUPS-DSN use parm DEST-GROUPS-DSN in the datacollector.
For example
SMTP-TEMPLATE-DSN='HIGHLEVEL.SOURCE(NSIEHTML)'
DEST-GROUPS-DSN='HIGHLEVEL.SOURCE(DB2GROUP)'
See