Try with valgrind. The compiler is probably initializing a variable only at -O0.
On May 16, 2011 8:28 AM, "Clemens Domanig" <clemens.domanig at uibk.ac.at> wrote: Hi everyone, maybe someone can explain to me what is going wrong with my code. In my programm I read values from a vector A and write them at new positions into a vector B. This works well as long as I don't use any optimization-flags when compiling the code. If I use -O1/2/3 the petsc tells me: "out of range error" at VecSetValue. It always happens at the some position although I'm doing this kind of operations at different places again. petsc-version 3.1.6 g++-version: gcc version 4.1.2 20080704 (Red Hat 4.1.2-48) Thx for your help - C. Domanig -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20110516/8f8be4fe/attachment.htm>
