Application Exception in DMODInitReceiveAllocate (276047)

SYMPTOMS

When you are running an Advanced Program-to-Program Communications (APPC) or Common Programming Interface for Communications (CPI-C) application, you may encounter an Access Violation (AV) in DMODInitReceiveAllocate.

If Dr. Watson is configured as the default debugger, an entry similar to the following may be appended to the Drwtsn32.log file:

function: DMODInitReceiveAlloc
        6721a1c4 8d54d034         lea     edx,[eax+edx*8+0x34]   ds:040cbeef=????????
        6721a1c8 83c9ff           or      ecx,0xff
        6721a1cb 33c0             xor     eax,eax
        6721a1cd f2ae             repne   scasb                        es:02ced4e8=??
        6721a1cf f7d1             not     ecx
        6721a1d1 2bf9             sub     edi,ecx
        6721a1d3 8bc1             mov     eax,ecx
        6721a1d5 8bf7             mov     esi,edi
        6721a1d7 8bfa             mov     edi,edx
        6721a1d9 c1e902           shr     ecx,0x2
FAULT ->6721a1dc f3a5            rep  movsd ds:0284f79c=20202020 es:02ced4e8=????????
        6721a1de 8bc8             mov     ecx,eax
        6721a1e0 83e103           and     ecx,0x3
        6721a1e3 f3a4             rep     movsb         ds:0284f79c=20 es:02ced4e8=??
        6721a1e5 33c0             xor     eax,eax
        6721a1e7 8b7dc4           mov     edi,[ebp-0x3c]         ss:03c2e26e=????????
        6721a1ea 668b4704         mov     ax,[edi+0x4]               ds:040cbeef=????
        6721a1ee 8d0c40           lea     ecx,[eax+eax*2]        ds:0000001b=????????
        6721a1f1 c1e103           shl     ecx,0x3
        6721a1f4 2bc8             sub     ecx,eax
        6721a1f6 8bb548ffffff     mov     esi,[ebp+0xffffff48]   ss:0284f7b0=02cc025c
        6721a1fc c744ce1004000000                                ds:013dea0d=????????
                                  mov     dword ptr [esi+ecx*8+0x10],0x4

*----> Stack Back Trace <----*

FramePtr ReturnAd Param#1  Param#2  Param#3  Param#4  Function Name
0284f868 63404de3 62e1b5b0 00000001 00a9a4bc 00a9a4d8 snadmod!DMODInitReceiveAlloc (FPO: Non-FPO [5,128,3])
0284f89c 63403254 00000000 63401bb6 0284fa0c 0f7e0000 wappc32!receive_allocate_proc  (FPO: [EBP 0x00014000] [0,3,4])
0284f8a4 63401bb6 0284fa0c 0f7e0000 00000000 77f674c0 wappc32!ps_verb_router  (FPO: [0,0,1])
0284f9bc 63401737 0f7e0000 00000002 62e018a0 00000000 wappc32!Appc_Main  (FPO: [EBP 0x0284fa0c] [4,65,4])