A software or hardware error occurred and caused the JES3 channel
end routine (IATDMDKT) to abnormally end. The FRR routine IATDMFR
was not able to recover from the error. Either the input/output service
block (IOSB) or service request block (SRB) in IATYISR might be erroneous.
The areas dumped are SQA, LPA, and CSA.
Associated problem data
Message IAT1801 is issued. For a description of message IAT1801,
see z/OS JES3 Messages.