Got simple Assembler program to run. It did have a error 'IEW1161 WARNING - NO ENTRY POINT RECEIVED' that needs fixing. Sounds bad but it was a warning. And it did read my 50 test disk records and wrote all 50 to printer. I need to re-familiarize myself with addressability. Not a terrible beginning. Syntactically, if not logically correct source, JCL that assembles and runs an Assembler program. In short...something I can work with.