FileDirectory exists: returns false for GPIO RasPi

> Hi,
>
> I'm trying to use the GPIO on the Raspberry Pi.
>
> After I export a GPIO before setting its direction I need to wait
> until all Folders and files of the GPIO pin are created.
> I try this with:
> FileDirectory default fileExists '/fullPathToTheGpio/direction'
> This never returns true.
>
> Any hint on how to find out when I can start writing to the file?
>
> I I just wait 3 seconds before writing to the pin for the first time
> it works. Subsequent writes work instantly.
>
> Thanks,
>
> Herbert
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