Hi! I have a problem with a code segment (actually one line). If I compile with no optimization (with or without debugging enabled) it's fine. If I optimize (again with or without debugging) it fails for one mis-computed line: pifn->bOn = (*pdTime < *pdTnext); if *pdTime is equal to *pdTnext (checked in gdb: print *pdTime - *pdTnext returns zero and print (*pdTime < *pdTnext) returns 0 too) the computed value of pifn->bOn is "1", and that's an error. I don't know exactly what to do and I am in a rush. I could try to go around all that, but an easy quick fix might be to turn off the optimization of the routine. However, I don't know how to do that. I get that with gcc 3.3.3 (suze linux), and on v 4.3.0 under debian linux. Thanks if you can help. Frederic
