Modify code that depends on the format of suppressed split messages in the DLOG

Description: The JES3 DLOG facility was introduced for tracking all message activity in a sysplex. It uses an MCS extended console to receive the messages and reformats them in the JES3 format. When these messages are longer than can be formatted into a single line, they are split into two lines. Before z/OS V1R13 JES3, longer messages having a receive ID were formatted differently if they were suppressed by the message processing facility (MPF). Beginning with z/OS V1R13 JES3, all suppressed messages with a receive ID are split in the same manner.

The following DLOG excerpt shows how a suppressed message (XXX100I) was split prior to z/OS V1R13 JES3: 
     10250 1143599  SY1 R= XXX33913 ICH70001I IBMUSER  LAST ACCESS AT 11:39:46 ON MONDAY, NOVEMBER 1, 2010
     10250 1144001  SY1 R= XXX33913 IEF403I XXX33913 - STARTED - TIME=11.44.00
MLG  10250 1144004 &SY1 R= XXX33913 +XXX100I 9012345678901234567890123456
MLG  10250 1144004 &SY1 R= XXX3391378901234567890123456789012345678901234567890123456789012345
     10250 1144004  SY1 R= XXX33913 IEF404I XXX33913 - ENDED - TIME=11.44.00
The following DLOG excerpt shows how a suppressed message (XXX100I) is split beginning with z/OS V1R13 JES3: 
     10305 1000486  SY1 R= XXX33913 ICH70001I IBMUSER  LAST ACCESS AT 09:57:46 ON MONDAY, NOVEMBER 1, 2010
     10305 1000488  SY1 R= XXX33913 IEF403I XXX33913 - STARTED - TIME=10.00.48
MLG  10305 1000494 &SY1 R= XXX33913 +XXX100I 9012345678901234567890123456
MLG  10305 1000494 &SY1 R= XXX33913 78901234567890123456789012345678901234567890123456789012345
     10305 1000494  SY1 R= XXX33913 IEF404I XXX33913 - ENDED - TIME=10.00.49

Steps to take: Ensure that any dependency on DLOG message formats are examined and corrected.

Reference information: For more information, see the "Message Format" chapter in z/OS JES3 Messages.

Parent topic: JES3 actions to perform before the first IPL of z/OS V2R1