[vJASS] File Exporter Command?

[Grimhollow]

So my File Exporter GUI in Grimex in World Editor does not work. So I am going to put codes to make command to export objects and triggers from my map with vjass.

I tried: (Creating custom text trigger)
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!external call File Exporter C:/Muffs

Then replies back at me with:
"Parameters are not correct" stuff.