Have you checked file system space by using "df -k"? If there are only limited space, you may mount other hard disk for new file system...then reinstall the product and specify new vtune global dir. - OR - Set VTUNE_GLOBAL_DIR to new directory of new file system.
Assume that you still have space in default file system: 1. Check if your user (running vtl) was in "vtune" group, chekc /etc/group 2. When running vtl command - some data will be generated under /opt/intel/vtune/global_data/vtserver_$USER 3. Final result should be generated under $USER/VTUNE/Projects
Other suggestion is to use other directory for setting VTUNE_GLOBAL_DIR - and your log-on uesrhaspermission to write data.
Also, note, that the global data directory is not cleaned up by deleting the project activities. The global data directory is like a scratch pad. You could try just deleting the contents of the global data directory before running the command line, again? You may not, however, want to delete the subdir ISM, which is the symbol cache for all previously processed modules.