Error importing old isosymbols file: (41,319) - RSE

(41,319)  ERROR - Cannot access file
/C:\PDMSUSER\PDMS12.1\new_iso_file - RSE

Trying to import old isosymbols file as it contains some symbols I cannot find in database. But no luck. Anyone knows that the RSE error is about? The isosymbols file itself is working fine when creating isometrics.

41, 319 = Barbeone Constructor Library, ERROR cannot access file #N #H

And if replace  '_'  symbols, in filename?

It was a very good guess :) but sadly didn't work...