CA JCLCheck CAY6354S HCD UVS REQUEST FAILED, RETURN CODE 99

Document ID : KB000098230
Last Modified Date : 12/10/2018
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Question:
Why does EDCHEK issue  "CAY6354S HCD UVS REQUEST FAILED, RETURN CODE 99" when they add APF dynamically ? 
Answer:
Logoff/logon was not done after JCLCheck loadlib was added to APF dynamically. LOGOFF once and LOGON to TSO again solves the problem.