Hi I'm trying to use gcov. No problems building executables and running them. But when I get to running gcov, at least on one object file, gcov gets stuck in an infinite loop. I've tried running it overnight, but no sign of progress by the morning. A few more details: We mostly use RHEL 4.0 to 5.3. We're using GCC 4.5.1 built inhouse. Any ideas where the problem might be? I haven't yet tried GCC 4.5.3. A+ Paul Floyd