CUSTOM parameter

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Enable special modifications to Model 204


Default value
Parameter type
Where set
On User 0's parameter line or reset by the system manager
Related products
Model 204 V6.1 or earlier


The CUSTOM parameter enables special modifications by Rocket Software to standard execution.

You do not have to enclose a single CUSTOM setting with parentheses, for example:


Multiple values must be specified in a list and enclosed in parentheses, for example:


Custom settings

The custom settings and usage are shown in the following table.

1 Century can be omitted on date input. V4.1
2 Century is omitted on date output. V4.1
3 $DAYI should return day values 2 through 8 (instead of 1 through 7). $DAY should equate values 2 through 8 as Monday through Sunday, and full-length day names should be returned. Value 9 returns MON-FRI. V4.1


Defaults to:


5 Print debugging information for all MQ/204 requests. V4.2
6 The LOGOUT message is:

M204.2628: uuuuuuuuuu aaaaaaaaaa LOGOUT yy mmm dd

7 Obsolete as of Model 204 V7.1. V5.1
8 Connect clients can issue the LOGIN command from Remote Command Line (RCL) threads. Clients can login with a new user name without closing the current connection to start another one. V6.1
9 Suppresses all output from all forms of the PRIORITY command. V7.1
10 Allows file name entry using more than eight characters. V7.4
11 Controls mixed-case password support for login passwords. If it is set, mixed-case login passwords are allowed for both external and CCASTAT security. If it is not set, all login passwords are uppercase.

As of Model 204 7.7, this setting also includes support for RACF special characters. The special characters whose support is added are described in IBM APAR OA43999 and listed here:

Ampersand & Asterisk * Colon : Dash - Equal sign = Exclamation point ! Left arrow < Per cent sign % Period . Plus sign + Question mark ? Right arrow > Underscore _ Vertical bar |

12 Swap order of system manager and system administrator test with external authorizer. Available as of Model 204 7.5. V7.5
13 Close VSAM files even if CLOSE=EOJ specified. V7.5
14 Require account ID (in addition to user ID) on logins. V7.5
15 Don't display user number on console (WTO) messages. V7.5
16 Append the user ID of the updating user to the date-time stamp (DTSFN) field values. V7.5
17 Preserves plus sign (+) in ASA column 1 for VBA datasets and USE PRINTER output to allow for overtyping. Line must contain plus sign in column 1, followed by blank, followed by anything:

PRINT '+ anything'

18 Allow SSLIBSIZE (JANUS DEFINE parameter) value greater than 16K (16384). V7.5

Change the Login failed message from:

M204.0349: Login failed


M204.0349: Enter logoff

(zap 75Z279 required)

Suppress the last line in the LOGCTL dialog during ADD, CHANGE, and DELETE.

LOGCTL C USER1 *** M204.0374: ENTER PASSWORD,PRIVILEGES,PRIORITY *** M204.0379: Enter terminal list, all, none, add, del, or return USER1 X'10' LOW ALL <----suppress this line *** M204.0376: Parameters accepted *** M204.0345: CCASTAT updated

(zap 75Z279 required)

FILELOAD; skip DDname check for CCA1WK01 to allow DFSORT to dynamically allocate sort work datasets. DFSORT will dynamically allocate CCA1WK01-CCA1WK06 unless overridden by //DFSPARM:


(zap 75Z279 required)
22 Use BATCH204 return codes if NUSERS is greater than 1. V7.5
(zap 75Z279 required)
23 LOGIN command processing: truncate a login user ID to 10 characters, and allow the login to continue with the password prompt. Without CUSTOM 23, a user ID longer than 10 characters fails immediately with M204.0349: Login failed, and no password prompt is issued. V7.7;
V7.6 (zap 76Z209 required); V7.5 (zap 75Z426 required)
24 IFSTRTN: Allow embedded blanks in passwords passed via IFSTRTN calls; requires semicolon as password delimiter. Leading and trailing blanks are stripped. V7.7
31 Extra bug checks for Ordered Index leaf pages. V7.5
32 Extra bug checks for all Ordered Index pages. V7.5
33 Issue a message (M204.1223) for every critical file resource wait. V7.5
34 Suppress APSY load stats from the journal. V7.5
35 Do not drain a subsystem when a user encounters a hard restart inside the subsystem. V7.5
36 An Insert statement with occurrence number 0 should place the inserted occurrence at the start of repeatable fields in the record. V7.5
37 Change M204.1076 (Do you really want to end the run) to indicate the job name rather than the location. V7.5
38 Allow any (non-privileged) user to reset LAUDIT. V7.5
39 Echo any MSGCTL command in a M204.0131 message. V7.5
40 Allow field constraints (UNIQUE, At-MOST-ONE) in non-TBO (FRCVOPT X'08' bit on) files. V7.5
41 Record data on successful RACF user logins by setting LOG=ALL in the SAF parameter list. The login data is shown in RACFRW batch reports. V7.7;
V7.6 (zap 76Z201 required);
V7.5 (zap 75Z420 required)
42 Allow the editing of procedure names containing a comma, equal sign, space, single quote, and/or semicolon. V7.7

Using the CUSTOM=(1) parameter with date conversions

If CUSTOM=(1) is added to the User 0 CCAIN stream or set later using the RESET command, the following occurs: If a CYY format is specified for conversion and only a YY input is supplied, the conversion is successfully completed by using the CENTSPLT and BASECENT parameters.


If CUSTOM=1, BASECENT=19, and CENTSPLT=95, then:

Print command Results









If CUSTOM=1 is omitted, BASECENT=19, and CENTSPLT=95, then:

Print command Results









Using CUSTOM=(2)

If CUSTOM=(2) is added to the User 0 CCAIN stream or set later using the RESET command, the following occurs: If a CYY-format is specified for output conversion and the C (century) indicator is zero, then C is eliminated. This C elimination is true for all $DATE… function calls.

For example:

If CUSTOM=(2) then: PRINT $DATEJ(2) prints 97.001

But if CUSTOM=(2) is omitted, then PRINT $DATEJ(2) prints 097.001.

Using CUSTOM=(6)

Using this option you can control the messages for the LOGIN and LOGOUT commands independently.

  • When CUSTOM is not set to 6, BATCH2 and IFAM2 applications cannot receive the return code from Model 204, if the command MSGCTL M204.0353 NOTERM is issued in the Online. Model 204 sends the return code to BATCH2 and IFAM2 User Language applications as a hidden field in the LOGOUT message, and the application must receive the LOGOUT message to obtain the return code.
  • When CUSTOM is set to 6, you can suppress M204.0353 and leave M204.2628 active and available for a BATCH2 or IFAM2 User Language application to receive the return code from the Online.

Using CUSTOM=(8)

The CUSTOM=(8) option lets Connect customers use one connection for multiple users.

  • If CUSTOM=(8) is not set, RCL behaves as in releases of Model 204 before V6R1.0; users receive the following message when issuing the LOGIN command:


  • If CUSTOM=(8) is set, any commands that are invalid for RCL receive the following message:


Using CUSTOM=(9)

The CUSTOM=(9) option lets you suppress all output from all forms of the PRIORITY command.

Using CUSTOM=(10)

Including CUSTOM=10 in the CCAIN parameter stream enables you to specify a DDname longer than eight characters. The first eight characters will be used.

Using CUSTOM=(11)

Including CUSTOM=11 in the CCAIN parameter stream enables you to specify login passwords containing lowercase characters:


Using CUSTOM=(12)

When using an external authorizer (RACF, ACF2, Top Secret), if a user issues a command that requires system manager or system administrator privileges, Model 204 will test for system manager privileges for the logged-in user using the external authorizer and, if that fails, test for system administrator privileges. CUSTOM=(12) changes the order of the tests in such a case so that a user is tested for system administrator privileges before being tested for system manager privileges.

Using CUSTOM=(18)

Before Model 204 7.5, a setting of greater than 16K (16384) was allowed for the SSLIBSIZE parameter of the JANUS DEFINE command. However, in theory this should have only been necessary for SSL 2 support, as SSL 3 and TLS compliant implementations should only use SSL records of 16K or shorter.

Since support for SSL 2 is disabled in Model 204 7.5 (because SSL 2 is deprecated for its many security flaws), there is seemingly no need for SSL buffers longer than the 16K limit. So, Model 204 7.5 reduces any value greater than 16K for SSLBSIZE and SSLOBSIZE to 16K. This prevents Model 204 from pointlessly allocating more storage than is necessary for SSL buffers.

However, it appears that there are a few SSL 3 and TLS implementations in use that send SSL records longer than 16K, despite the standard's proscription against doing so. If a site communicates with such implementations, it might be necessary to set CUSTOM 18, then set SSLIBSIZE (or SSLOBSIZE) to a value greater than 16K.

Using CUSTOM=(42)

Before Model 204 7.7, a procedure with a name containing the following special characters could be created and displayed, but it could not be edited:

comma (,)
equal sign (=)
space ( )
single quote (')
semicolon (;)

If CUSTOM 42 is turned on, you can edit a procedure name containing these special characters, such as A B C, which contains spaces. To edit procedure names containing special characters:

  • Enclose the name in single quotation marks:


  • If the name contains single quotes, such as A'B'C', you must use two quotation marks for each single quote within the name (and enclose the name in single quotation marks):

    EDIT 'A''B''C'''

  • If an EDIT command inadvertently contains more than one comma, such as E 0,,PDS6884, you enter an edit session. (Without CUSTOM=42, the EDIT command is rejected). If the edit is saved, a procedure with the name ' ,' (that is, space comma) is saved. Subsequently referencing this procedure must include the leading space and enclose the name in single quotation marks:

    E ' ,' DELETE ' ,'