scirptinng : relative path

Hi everyone,

I'm writting an AE script to automate a part of my work. (written on Mac os) In a part of the script I need  an access to a specific file.

I organised a folder like this :
AE scirpt.jsx
./sources files folder / sourcesfiles.mov

The problem is that the program don't recognise the relative path.(I tested with / or ./ )
I realised a test by copying the sourcefile.mov in the macHD  and writing ./sourcefile into the script and it works...

Did you have a similar problem ?
How do you write relative path in AE scripting ?

thanks for your answer
(sorry for  my english level, I'm french).