Your SYSMOD may depend on another USERMOD or IBM® PTF being installed, because you depend on the function provided by that SYSMOD. You may want to indicate that this SYSMOD is part of a set of USERMODs designed to provide some user function. Because each SYSMOD contains only one element, you want to tell SMP/E that they should all be installed together. This is done with the REQ operand (the ccccccc values in the example).