Installed CA Common Services (CCS) v15.0 and at the time of customization I couldn't find SPNPARM member in v15.0 CAW0OPTN library where the same member is in v14.1 CAW0OPTN library.
Environment
Release : 15.0 Component : CAICCI-MVS
Resolution
CCS does not deliver a member named SPNPARM at either release level. If you have one in the 14.1 CAW0OPTN library it was manually created.
Most likely the SPNPARM member was provided/documented by another product that uses CCI SPAWN for functionality.