meRanCall returns "Illegal instruction (core dump)" error after first execution

[GiorgiaBucciarelli]

At the first execution meRanCall worked properly, but when executing again it returns an "Illegal instruction (core dump)" error.
The same thing occurred to other members from my lab.
We found out that at the first execution meRanCall generates a file "/tmp/par-*" that, once removed, allows for a new execution of the tool.
This behaviour repeats itself after every execution.