Can not open QETEST and NDVRTEST from steplib

Document ID : KB000115782
Last Modified Date : 26/09/2018
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Issue:
We have removed V18R0 datasets from linklist and tried to open V18R12 QE and Endevor panel from logon procedure STEPLIB. We are getting a S0C4 abend in EXIT7

How can we solve this problem?  
Environment:
All supported versions of Endevor
Resolution:
Verify that the C1EXITS Load library has been added to the STEPLIB in the logon procedure.