PDS member sub.exec.scomn
No you have not! A member name is a max of 8 characters with no '.'s.
To process a PDS using rexx your easiest solution is to use the ISPF Library Management services. You will find documentation for this in the IBM manuals for TSO and ISPF. You can Google to find the manuals (or search your company's network to see if the manuals are there). Hint: for your search term on Google cut and paste some of the text in this post.
The problem I have is that people can explain things quickly but I can only comprehend slowly.