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U4036-6 abend


IBM Mainframe Forums -> ABENDS & Debugging
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Grant Goodale

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Joined: 13 Nov 2010
Posts: 55
Location: Brampton, Ontario, Canada

PostPosted: Thu Apr 04, 2013 12:54 am
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I am running a DB2 Cobol program that is calling an Assembler module which does things with 64 bit storage.

I am experiencing a U4036 abend with a reason code of 6 which tells me that there was a problem when in 64 bit mode.

No doubt, I am getting some kind of program check in my Assembler module. The problem that I am having is trying to get the PSW that will tell me where I am failing. The only messages that are coming out are those telling me that a dump was created. The IPCS LEDATA and SUMMARY commands are not giving me any additional information either.

Can anyone suggest how I might get the address of the failing instruction?

TIA
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nevilh

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Joined: 01 Sep 2006
Posts: 262

PostPosted: Thu Apr 04, 2013 8:30 pm
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Assuming you have a complete dump there is a good chance that the information you are looking for can be found in the SYSTRACE option of IPCS.The system trace is a wrap around area and is used by the whole system so if the dump is taken too late it is possible that the data has already been overwritten
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Grant Goodale

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Joined: 13 Nov 2010
Posts: 55
Location: Brampton, Ontario, Canada

PostPosted: Thu Apr 04, 2013 9:04 pm
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I forgot about that one. Thanks.

I have figured out the problem using various crude breakpoints but I want to know better, more formal ways of doing this sort of thing for future reference.
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