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[bade_miya]

Hi All,

We are trying to invoke a test program via IMS Connect. I am using a 700K input request. The IMS application program is invoked and it is able to read the entire message through multiple GN calls. But when I am inserting the response back to the IMS message queue via multiple ISRT calls, the program is failing with U0476 error. The same program without any code change is working for smaller messages like 200K and client gets back the message.

My question is whether we need to take anything special into consideration while inserting multiple segments. I am dividing it into chunks of 32K (32763 bytes) data for each insert.

Here is my ISRT call

[kolusu]

bade_miya,

AFAIR , U0476 abend is due to PSB error. Make sure the IMS-DC-PCBNAME contains a valid PSB name

Kolusu

[bade_miya]

Kolusu,

Thanks for the reply. I am only using IO-PCB in my program. I am passing 'IOPCB ' to IMS-DC-PCBNAME. Another doubt I have is that if it was a problem with the PCB, why is it not failing for smaller messages and for the GU calls? I checked the manuals and it says about various reasons (including the one which you mentioned). One of the reasons is because

[Anuj Dhawan]

[bade_miya]

Thanks everyone for the feedback. Just came here to tell you that my issue is resolved and the root cause so that someone else can benefit from it.

In my case, the large message was overflowing in the working storage section to the AIB mask defined under the overflowing field. Thus the first 8 bytes of the AIB mask was overwritten by some value other than 'DFSAIB'. The manual says one of the reason for U0476 abend to be

An address for an AIB was provided but the first eight bytes of the block do not equal 'DFSAIB'.

Fixing the overflow fixed my AIB mask and rectified the U0476 issue. Hope this will be helpful for someone

[dbzTHEdinosauer]

bade miya,

Thank you for returning with the resolution.
_________________
Dick Brenholtz
American living in Varel, Germany

[expat]