anyway, in case someone else has problems with files that could have a "strange" path, I suggest EVER to use Process Monitor (aka procmon) of sysinternals:
http://live.sysinternals.com/Files/ProcessMonitor.ziplaunch it, set the filter:
Path -> contains -> name_of_the_file_you_want_to_find (example dump.txt)
when there will be an access (of any type) to that file procmon will show the full path where it was tried to be accessed.
easy job