Test JCL which created the temporary file as:
Then referenced in a later step as:
In standard JCL this did work and produced two unique temporary datasets:
Can REFERBACK be used in an Endevor Processor and expect it to act in the same way?
All Supported Releases
REFERBACK being used in an Endevor Processor it is not supported
Endevor processors support the EXEC statement, but they do not support backward reference (REFERBACK), or these EXEC statement parameters:
See Unsupported Parameters for more information.