Using several ESP source JCL PDS libraries. Some of them with FB and 80 REC length, few of them are FBA and 80 REC length. Are the one with FBA format required?
ESP Workload Automation 12.0 - z/OS supported releases -
ESP does not require the FBA format for its JCLLIB. It does not have any special processing for FBA and works with it as if it was the FB format.
The JCLLIBs can be consolidated to have the FB format.
After the copy from FBA to FB, make sure that the JCLs were copied completely and the 1st byte is not missing.