How to define the path to a database which is the subject of a farcall statement?

I want to issue a farcall statement from a database to a second database which is in a sub-folder of the folder containing the calling database. I keep getting the “…file is not open …” error message so I assume that I’m not specifying the path correctly. I’m using this code:

farcall "Excel Auto_Open files/FuelDataLoader",".CollateData"

Replacing the slash with a colon doesn’t help. Do I need to specify the entire path and, if so, in what format, standard or HFS?

The path is irrelevant. The file must already be open, so you only specify the filename, not the path.

Doh! several times.