Not A Path Constant

Returns a path whose value is Not A Path. You can use this path as an output from structures and subVIs when an error occurs.

For example, you can use the Not a Path constant and the File/Directory Info function to verify that a file or directory exists on the computer before passing the path to the next file I/O operation. Wire the error out cluster of the File/Directory Info function to the selector terminal of a Case structure. Place the Not a Path constant in the Error subdiagram and wire the constant through the output tunnel and to the next file I/O operation. In the No Error subdiagram, wire the dup refnum output of the File/Directory Info function through the Case structure and to the next file I/O operation.