System-level debugging with CODB

The CODB debugging transaction allows you to display and modify memory.

It is menu-driven and allows you to choose various CICSplex data areas using PF keys or command line keywords.

After logging onto CICS®, enter the CODB transaction ID to display the main menu, as shown in Figure 1. (CODB can also be entered from the DUMP command of the COD0 transaction.)

Figure 1. CODB debugging transaction menu

 COMMAND==>            COMP ID==>      ADDR==>           ALET==> 00000000
 
          1.  XLWA
          2.  MODB
          3.  MOEB
          4.  OPB
          5.  EIS
          6.  EIB
          7.  STAKSTRT
          8.  STAKEND
          9.  MODD
         10.  MAL
         11.  PFKON
         12.  PFKOFF
         13.  END
         14.  CMASSTOP
         15.  TRACE
         16   QUES
         17   MENU
 
 P1=TOP  P2=BOTM  P3=END  P4=PREV  P5=NEXT  P6=TOKEN  P7=BACK  P8=FRWD
 P9=JUMP  P10=DSJUMP  P11=ALTER  P12=ALET/OFFSET
 MSG==>

The first field is for the command, the second is for a component ID (which is required for some commands), the third is for the address (or AR mode offset), and the last is for an ALET or zeros.

Note: The CODB menu can be redisplayed at any time by issuing the MENU command.