WORD FOR OS/2 DOCUMENTS MUST BE SAVED AS WORD FOR
DOS USING WORD FOR OS/2.
 
You attempted to open a Word for OS/2 document
with Word 5.5. Word 5.5 cannot open the document
in OS/2 format.
 
■ Use Word for OS/2 to convert to Word 5.5
  format. Then choose File Open.