No idea if it's of any use, can't reproduce it but copied the stack trace:
038e9a7b change_topmost_mdi_child(<ptr>structÄfancy_window)#70 [+00c6] 038ea8c5 winio_winproc@16#70 [+6481] 75406238 routine at address 75406238 [+0000] 754068ea routine at address 754068EA [+0000] 75407d31 routine at address 75407D31 [+0000] 75408112 routine at address 75408112 [+0000] 03896714 __yield_program_control [+0246] 100094fa sdbg_main [+172e]
Error message was 'The instruction at address 038e9b41 attempted to read from location 085ce022', using ftn95 v6.00 reg under Win7/64bit.