Execution terminated by abort of environment task

[matxil]

I used to have a C++ code that worked very well with PHCpack, using a phc_solve.c code as example. It loops over a file with diffferent polynomials, and then looks for the solution(s) for each of them.
However, I now put this code on a new computer (Ubuntu 18) and I ran into a problem that I think is Ada related. I can compile fine (with gnatmake v.7.5.0) and my program runs fine the first 2 loops but the third time I call "solve_system" (as defined in phcpack.c), the program throws an exception and quits. The message it gives is:
Execution terminated by abort of environment task
It seems Ada related but with google I could not find any useful information about this error message. How can I fix this?