I see two possible cause for your problems here (maybe both). I apologize, because they're both semi/not documented... 1) It is strongly suggested *not* to install with /usr or /usr/local as the $prefix. From version to version, things change and you end up with old junk that causes conflicts. Instead, install with a prefix set to an overflow-only directlry. 2) There's a VFLOW_PATH environment variable which you have to set. It's a colon-separated path that must include the $prefix/lib directory, as well as all the $prefix/toolbox/... directories. Also, remember to put your $prefix/lib directory in your LD_LIBRARY_PATH. All that's a bit ugly and making it cleaner is on the TODO list. I hope this helps... otherwise, try starting vflow and tell me what the errors are. If there's anything else, feel free to contact me. Jean-Marc -- Jean-Marc Valin Universite de Sherbrooke - Genie Electrique valj01 at gel.usherb.ca