Can't open output file: filename.
The specified file cannot be opened. There might be too many files open already, the path might not be valid, or the output filename (that is, the destination filename) might be the same as an existing directory name. Also, the file might be read-only, locked, or on a write-protected disk.
Make sure that you have correctly specified the path and filenames, and that the destination filename is not the same as an existing directory name. If you continue to receive this message, at the command prompt use the attrib command to see if the output file is read-only and to make sure the share command has not locked the file. If the output file is on a floppy disk, make sure the disk is not write-protected. If you still receive this message and you have other files open, close some files so the new file can be opened.