I upgraded to ACF2/CICS r16 and I am unable to signon to CICS getting message: DFHCE3500 Unable to interpret keyword data. Sign-on is terminated What is causing the sign-on error?

Document ID : KB000016182
Last Modified Date : 14/02/2018
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Question:

I upgraded to ACF2/CICS r16 and I am unable to signon to CICS getting message: DFHCE3500 Unable to interpret keyword data. Sign-on is terminated What is causing the sign-on error?

DFHCE3500 Unable to interpret keyword data. Sign-on is terminated

The signon screen looks like IBM's and not the ACF2 signon screen. What did we do wrong?

Answer:

The ACF2 transactions are not set up correctly in the CSD that CICS uses. All desired signon/signoff transaction codes should be associated with ACFAEUSC rather than DFHSNP. These should/would include: CESN, CESL, CESF and maybe CSGM. 

Also r16 ACF2/CICS PTFs RO93181 and RO97057 are recommended.