Windows 10 and Append General

So I have used this approach for 20 years and it has always worked My client prepares an invoice using Word The file is "INV"+alltrim(str(invnum))+".DOC" E.g. INV12345.DOC

The system says append general rtfgen from &newfile LINK

It is then easy to print this on the report

It seems this no longer works with Win10

My thoughts at this time are to no longer store the data in a General field, and to print the DOC file as part of the report. BUT, I can't figure how to do that. I can print pictures, BMP's, Gif's etc, but not a Doc file

Can anyone throw some light on this, or offer some suggestions?