Importing a STAAD PRO *.STD file into AECOsin Building Designer CE update 4

From Backstage > File > Import > Structural > STAAD Import

Browse to .std file

Tick Use Mapping File

Browse to str2stdUK.txt

Tick Verify

Select Import

It runs a little then I get "Error Reading File" followed by "File Import Complete".

Nothing to show in Design Model view.

ANY help much appreciated !!