CVU installation requirements are:
At least 30 MB free space for the CVU software on the node from which you run CVU
A work directory with at least 25 MB free space on each node. The default ___location of the work directory is /tmp on Linux and UNIX systems, and the value specified in the TEMP environment variable on Windows systems. You can specify a different ___location by setting the CV_DESTLOC environment variable.
When using CVU, the utility attempts to copy any needed information to the CVU work directory. It checks for the existence of the work directory on each node. If it does not find one, then it attempts to create one. Make sure that the CVU work directory either exists on all nodes in your cluster or proper permissions are established on each node for the user running CVU to create that directory.