DFS3420X RESIDUAL MESSAGES EXIST FOR DELETED TRANSACTIONS

Explanation
 IMS detected existing messages for
a transaction that does not exists. The transaction definition does
not match the message activity indicated on the IMS system
log.

System action
 IMS terminates abnormally with abend
3420.

Programmer response
 The log data set is inconsistent with the
definition in the MODBLKS data set. The SMB blocks, which were loaded
from MODBLKS during initialization, are not the same as those which
were last active during the prior IMS execution.
This situation can occur if the MODSTAT data set was reconstructed
specifying an incorrect ddname of the active MODBLKS data set. It
can also occur by changing the contents of the MODBLKS data set while IMS was
not active. Use the same copy of MODBLKS that was in use during the
last IMS execution, and restart IMS with
a /ERE from the last checkpoint that was taken
with a memory dumpQ.