Changes to control tables

This section summarizes the changes to CICS® control tables across supported CICS TS releases. For each CICS release, you must reassemble all tables by using the latest macros, even if there are no changes to the macros. From CICS TS 5.3 onwards, CICS checks during initialization whether the macro tables that it is loading have been reassembled, and if they have not been reassembled, message DFHLD0110 is issued and CICS terminates.

If you are upgrading from an end-of-service release, you can find information about the changes that are relevant to those releases in Summary of changes from end-of-service releases.

Highlights of changes across supported releases of CICS TS

Table 1 lists changed control tables in each supported CICS TS release. The links provided take you to the relevant tables below where brief descriptions of the changes are provided.

Table 1. Highlights of CICS control table changes across supported CICS TS releases
5.4 5.5 5.6 6.1
 

Changes to control tables by release of CICS TS

View changes by control table:

DFHMCT
Table 2. Changes to DFHMCT by release
5.4 5.5 5.6 6.1
  CHANGED:
  • New option URIMAP on DFHMCT TYPE=INITIAL, to set a limit for URIMAP transaction resource monitoring
  • New option WEBSERVC on DFHMCT TYPE=INITIAL, to set a limit for WEBSERVICE transaction resource monitoring
    

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DFHPLT
Table 3. Changes to DFHPLT by release
5.4 5.5 5.6 6.1
  CHANGED:

Assembled PLTs are no longer processed by CICS. Instead CICS reads the source of the tables from PARMLIB or DFHTABLE and uses it to control PLT processing. This involves CICS issuing an MVS service call IEFPRMLB req=allocate from DFHAPTB, which might result in information message IEF761I being issued. Ensure CICS has READ access to data sets in PARMLIB or DFHTABLE concatenations. For details, see Program list table (PLT).

    

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DFHXCOPT
Table 4. Changes to DFHXCOPT by release
5.4 5.5 5.6 6.1
CHANGED:
  • The default for the CICSSVC parameter has changed from 0 to 216.
  • New parameter LOCALCCSID
  • The TRACE parameter has a new value of 3 to allow for level 3 tracing.

CHANGED with APAR PH09898: The EXCI SURROGCHK parameter has been removed. Surrogate checking is always done. Specifying SURROGCHK=YES in the EXCI options table, DFHXCOPT, is accepted for compatibility.

 CHANGED with APAR PH09898: The EXCI SURROGCHK parameter has been removed. Surrogate checking is always done. Specifying SURROGCHK=YES in the EXCI options table, DFHXCOPT, is accepted for compatibility. CHANGED:
  • The EXCI SURROGCHK parameter has been removed. Surrogate checking is always done. Specifying SURROGCHK=YES in the EXCI options table, DFHXCOPT, is accepted for compatibility.
  • The default for the CONFDATA parameter has changed to HIDE. The HIDE option replaces HIDETC, which means that all transport data is subject to CONFDATA. If the deprecated CONFDATA=HIDETC is specified in DFHXCOPT, CONFDATA=HIDE is assumed, and no message will be issued.

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For information about SIT parameters, see Changes to SIT parameters.