access violation

[wwendele]

hi
when i execute my program i get a very weird problem. when I debug it, it seems that it reaches the end of a subroutine, but doesn't execute whatever's behind it.

...
call subroutine1
write(*,*) 'test'
...
subroutine subroutine1
...
end subroutine subroutine1

so the breakpoint at the "end subroutine" statement is reached, but it never reaches the "write" statement
the program stops with "forrtl: severe (157): program exception - access violation"
"stack trace terminated abnormally"

and

First-chance exception at 0x004e1b75 in fs_la_1d_eemission_nr.exe: 0xC0000005: Access violation reading location 0x00000000.
Unhandled exception at 0x00000006 in fs_la_1d_eemission_nr.exe: 0xC0000005: Access violation reading location 0x00000006.

Any help would be greatly appreciated
Thanks in advance

[Les_Neilson]

The usual response to this sort of problem is that the problem lies elsewhere in the code (memory corruption)
(a) do you have array bounds checking switched on ?
(b) do you have "implicit none" in your code ?
(c) check for argument mismatches ?

Les

[wwendele]

Thanks, I have included the implicit none statement and now it works.

[Les_Neilson]

Well that on its own wouldn't fix the problem. What else did you change?

Les