Debugging Skill

what has happened so far in the past 8 hours is heights of insanity...

i am compiling a paralel program:
mpicc -lm dataparallel.c ../matrix.c -o dataparalel

and running:
mpiexec -np 64 dataparallel (watch the no. of l's in the word dataparallel)

and i expect the modifications to the code to work in an increasingly enticing but innocent executable (It prints beautiful output for every idea i tried). I guess, my project is more than interesting; given the debugging skills i'm demonstrating.