Joined: 23 Nov 2006 Posts: 19270 Location: Inside the Matrix
Load libraries are of undefined format because the operating system requires it. This is not some decision made by the system support or operations people.
RECFM=U is better suited for the type of "data" that is stored in a loadlib. It is good to remember that your "executable" is just more data to the system internally - until it is loaded into core and control is passed to it.