Dear all, when trying to evaluate G(I,sqrt(2)) I get "Segmentation fault", both in ginsh as well as in a program: --- begin code --- #include <ginac/ginac.h> using namespace GiNaC; int main () { ex two = 2; ex res = G (lst (I), sqrt(two)); return 0; } --- end code --- Not sure whether this is a different issue, but if instead use try to evaluate G(I,1/sqrt(2)), I get the error-message from cln: --- begin output --- terminate called after throwing an instance of 'cln::notreached_exception' what(): Internal error: statement in file float/conv/cl_F_from_RA.cc, line 27 has been reached!! Please send the authors of the program a description how you produced this error! Aborted --- end output --- I'm using GiNaC v1.6.4 with cln v1.3.3 on OpenSuse 13.2. I compiled GiNaC with gcc v4.8.3. Does this happen on other machines also? Yours, Alex