I have never had any problems with running the script, but now (after today's updates) I am getting:
0 [main] rsync (10556) d:\CWRSYNC\rsync.exe: *** fatal error - cygheap base mismatch detected - 0x116B400/0x115B400.This problem is probably due to using incompatible versions of the cygwin DLL. Updating cwrsync to the latest version does not help.
Try to restart your PC.