4.1 DFSMS enhancements checklist Table 4-1 contains a checklist of enhancements to the DFSMS components of the operating system. Table 4-1 Checklist of outage avoidance items for BCP component of z/OS and OS/390 Features/Enhancements DFSMS CATALOG Abnormal End of Service Task Introduced in z/OS release 1.5 Description The MODIFY CATALOG,FORCE command allows you to abnormally end a service task even if it is in recall. See 4.1.1, "DFSMS CATALOG Abnormal End of Service Task" on page 49. Freeing resources held by Catalog Address Space 1.4 The MODIFY CATALOG,RESTART, CLOSE, and UNALLOCATE commands can be used to release resources held by Catalog Address Space and to resolve numerous CATALOG-related problems. See 4.1.2, "Freeing resources held by the Catalog Address Space" on page 50. DFSMS SYMREC 1.4 New DFSMS symptom records written to LOGREC. See 4.1.3, "DFSMS SYMREC creation" on page 51. Dynamically changing CATALOG attributes set at IPL time 1.4 The MODIFY CATALOG command allows you to alter a number of attributes that are initialized at IPL time. See 4.1.4, "Dynamically changing CATALOG attributes Exploited?