When implementing a design on a Samba shared network drive, I get a warning message similar to the following:
rm: WARNING: Circular directory structure.
This almost certainly means that you have a corrupted file system.
NOTIFY YOUR SYSTEM MANAGER.
The following directory is part of the cycle:
xst
`xst ....'
This problem has been seen with XPS running on Windows Vista. The only known work around is to download Cygwin's rm.exe version 6.10 and replace the rm.exe found in directory C:\Xilinx\10.1\EDK\cygwin\bin.