My problem started when I tried to write some REXX tools. I had a CALL command for which I used an "ADDRESS TSO" to use. I found that the called (Assembler) program could not see the parameters I passed. I then tried to do the call statement from the command line in TSO. The same thing happened. I tried calling another Assembler program from the TSO/ISPF Command line with passed parameters and the 2nd program also returned an error 'MISSING PARAMETERS'. For some reason my programs are not receiving any parameters that I pass. I found these programs in the Web and linked them using JCL provided. I am wondering of the parameter problem might be the result of incorrect linking? My call example and link Exec I used to link are below. Any suggestions are welcome. Thanks.