Resolution:
For OTMA to work properly, the OTMA C/I module DFSYSVC0, needs to be loaded and registered to the SVC services by an authorized address space running on the same z/OS image as the application programs that will be accessing it. If you get a SF92 abend when the OTMA enabled IMS Adapter starts, this usually means that the OTMA C/I module DFSYSVC0  has not been LOADed. This may have been caused due to faulty post-IPL procedures where an IPL has recently been done and OTMA C/I module DFSYSVC0 has, for some reason, not been loaded.

OTMA Callable Services provides a stand-alone program, DFSYSVI0, that must be run after MVS IPL to initalize the OTMA C/I. You must add an entry in the MVS program properties table (PPT) for the OTMA Callable Services initalization program. The steps for doing this are:

   1. Edit the SCHEDxx member of the SYS1.PARMLIB data set.

   2. Add the following entry to the SCHEDxx member:

      PPT PGMNAME(DFSYSVI0)
            CANCEL
            KEY(7)
            SWAP
            NOPRIV
            DSI
            PASS
            SYST
            AFF(NONE)
            NOPREF
            
3. Take one of the following actions to make the SCHEDxx changes effective:

         Re-IPL the MVS system.
         or
         Issue the "MVS SET SCH=" command.

RELATED READING: For additional reading about updating the program properties table, see the IBM "MVS Initialization and Tuning Reference" manual.

A sample JCL proc for running DFSYSVI0 is as follows:

      //OTMAINIT PROC RGN=3000K,SOUT=A
      //IEFPROC  EXEC PGM=DFSYSVI0,
      //             REGION=&RGN
      //STEPLIB  DD  DISP=SHR,UNIT=SYSDA,
      //             DSN=IMSVS.RESLIB
      //SYSPRINT DD  SYSOUT=&SOUT
      //SYSUDUMP DD  SYSOUT=&SOUT

Ensure that the above PROC is re-executed after every IPL.  It would be helpful if this could be *automated* to run after every IPL.

Also, if currently you  are overriding the IMS/TM startup options by using the command, such as:

          S IMS81,PARM1='IMSID=I81E,OTMA=Y,OTMASE=N,OTMANM=IMS81S,GRNAME=I81E'

perhaps it will be better if the  PROC you use to start IMS/TM,  includes "OTMA=Y" as a standard feature.