OS:  Ubuntu 11.04<br><br>Compiled with g++:  g++ -o test test.cpp -lcln -lginac<br><br>GiNaC ver:  1.60<br><br>Sample version of program attached.  Program generates Hermite polynomial to high degree.  It then subs into it a series of numbers.  The output RANDOMLY generates an incorrect answer.  No answer after a substitution should ever be zero, yet zeros inevitably appear.  The problem occurs once out of every 3 executions, on average.<br>