Retrieving some context from Fortran runtime errors

[Alberto Luaces]

Hello,

I have a C++ program that uses a library written in Fortran. Currently the 
program stops with this message:

Fortran runtime error: Attempt to DEALLOCATE unallocated memory.

However, as it doesn't segfaults nor dumps core, I cannot find which 
DEALLOCATE is the culprit. How could I find it?

gfortran gcc version 4.3.1 (Debian 4.3.1-9)

Thanks,

Alberto