I loaded Excel then the Word .doc and did some updating in Excel. I linked an updated cell value back to Word - OK. When I tired updating an existing link the original error message came up again and Word froze. I clicked on the Office Assistant and this caused blinking for about ten seconds and when it stopped the error message had gone and the links had been updated. I did some more work on Excel, without linking to Word, but Word has now seized again with the error message. I will now re-boot so Word will work.