I have Mac 10.7.3 clients
Latest version of Word 2011

NetWare 6.5.8 volumes are shared as AFP

\\server\volume2 = no problems, Word can open doc? save etc
\server\volume1 = following error (either double click or File/Open)

Word cannot open this document. The document might be in use, the document might not be a valid Word document, or the file name might contain invalid characters

I can copy the doc? to the volume2 & it opens fine

Really puzzling, as it is the very same server

Help appreciated