getting filename from a field

[CamMac2]

How can I use Troi File to rename a file with the contents of a field? (and without any user intervention)

I have everything set with MoveFile, but it seems to want the filename to already be in the script.

The field name is "Company No. for export" and this is how it is done in DialogMagic:

External("DM-RenameFile", "Export.txt|" & Company No. for export)

but I don't see anything in Troi's documentation regarding getting the filename from a field.

Any ideas?

(PS I have this question submitted to troi also, but have not heard back from them...)