mprun unexpectedly terminates with Signaled.

I compilea program for parallel execution with sun hpc (SIESTA).

mprun works and all the examples ( prime connectivity and monte ) work fine with

/opt/SUNWhpc/bin/mprun -np 4 ./connectivity

program compiles fine, I use precompiled blacs and scalapac from netlib.org

However after about a minute (I gess after reading and parcing all the input) it terminates / quit with the only word:

Signaled.

What could it be? How to get more error text to see where to look for the source?

==================it looks like this:================================

...

KBgen: Kleinman-Bylander projectors:

l= 0rc= 1.936440el= -0.799365Ekb= 4.661584kbcos= 0.299914

l= 1rc= 1.936440el= -0.306456Ekb= 1.489367kbcos= 0.301624

l= 2rc= 1.936440el= Signaled.

[816 byte] By [macUser911] at [2007-11-26 7:41:41]