KO2O1145E APPLICATION TRACE START REQUEST HAS FAILED. THE VSAM DATA SET CANNOT BE OPENED. CHECK LOG

Explanation
 The Application Trace Facility (ATF) detected
an error when opening the VSAM data set for use.

System action
 The ATF is terminated.

User response
 Check the system log for the specific reason.
Correct the problem, and invoke the ATF again.