DFS2400I ERROR WHILE ATTEMPTING TO FORMAT THE ccc...ccc

Explanation

During memory dump formatting, an error was encountered while attempting to format a control block or data area. Field ccc...ccc, which can be up to 16 bytes in length, identifies the control block or data area being formatted.

In an online environment, memory dump storage is in the IMS memory dump Formatter.

Users of the memory dump formatter should be aware that the original cause of the abnormal termination of IMS might cause the memory dump formatter to program check.

Some of the common failures of the memory dump formatter are:
  • Invalid use of save areas and their linkages. The memory dump formatter assumes that register 13 always points to a save area. The forward and backward pointers in the save area are valid. BALR 14,15 is used as standard calling convention.
  • Invalid IMS control block addresses. The memory dump formatter assumes that all addresses pointing to control blocks are valid. The memory dump formatter does not validate addresses.
  • Invalid IMS control block contents. The memory dump formatter assumes that all IMS control block contents are valid.

System action

For most errors, a diagnostic memory dump immediately follows this message. This diagnostic memory dump consists of the following:
  • The contents of SDWA, which includes the PSW, completion code, module ID, registers, and a memory dump of the SDWA area.
  • Instruction area, which includes 128 bytes of data before and after the failing instruction (total of 256 bytes).
  • Communications area, which is the control block used by the IMS memory dump Formatter for intercommunication between the formatting modules.
  • Save area, which is a memory dump of the save area set used by the memory dump formatter.
  • The memory dump formatter module vector table.
  • Dump formatter storage buffer header and prefixes (offline formatting only).
  • Dump option request block storage (offline formatting only).

Following the diagnostic memory dump of the error, the memory dump formatter continues formatting the next IMS control block requested.

A diagnostic memory dump is suppressed when any of the following forms of ccc...ccc is received:
  • 'PSB' (and there is no DL/I storage in the memory dump)
  • 'AUTO OPTION PROC' (and debug was not requested)
  • 'ABND DIAG. AREA'
  • 'SA - EP ADDRESS'
  • 'SAP'
  • 'ECB PREFIX'
  • 'SAVE AREA'
  • 'REGISTER AREA'
  • 'SA - INV FWD PTR'
  • 'QUEUE BUFFERS'
  • 'UEHB'
  • 'LATCH LIST'
  • 'ECB STORAGE'
  • 'XMCI BLOCK'
  • 'USE LIST (CULE)'

User response

Despite the failure of the IMS memory dump Formatter, the output might still provide enough information to help you diagnose your original problem. If the memory dump formatter output does not provide enough information, contact the IMS system programmer.

Programmer response

Use the diagnostic memory dump to determine the cause of the problem. If the diagnostic memory dump is suppressed, contact the IMS system programmer.