SVC 121
SVC 121 is a Type 1 SVC issued by a VSAM macro. This macro gets a LOCAL lock and calls load module IGC121.
Reference Sources
IBM z/OS MVS Diagnosis Reference
SVC 121 is a Type 1 SVC issued by a VSAM macro. This macro gets a LOCAL lock and calls load module IGC121.
Reference Sources
IBM z/OS MVS Diagnosis Reference