I wonder if that's something funny about where it's being run from, permissions or somesuch. Could you do some more digging and see if you can pin down what path it was trying to open and why it failed?

i had the same problem,
in my case the error hapens in the path :> 'C:\Users\mateu\OneDrive\Documents\GitHub\SIPPAG-DEV\pfs\tables\Tbl_Clientes.txt'

the error don't exits if export only one table

i maybe found the solution, appers the error is a missing path 'pfs'

in function ExportAllSource --

i've added the line

VCS_Dir.VCS_MkDirIfNotExist source_path_pfs

result:

source_path = VCS_Dir.VCS_ProjectPath() & "source"
source_path_pfs = VCS_Dir.VCS_ProjectPath() & "pfs"
VCS_Dir.VCS_MkDirIfNotExist source_path
VCS_Dir.VCS_MkDirIfNotExist source_path_pfs