i've seen this happen when the network has lost track of the workbook ...
choose file / save as and try and save to your local hard drive

if that doesn't work, open a new workbook and save it and then use the move
or copy sheet option to COPY each sheet into the new book, saving the new
book after you do each one

GOOD LUCK

--
Cheers
JulieD
check out www.hcts.net.au/tipsandtricks.htm
....well i'm working on it anyway
"MoTo" wrote in message
...
i had open a huge speadsheet with about 20 + sheets typing away inserting
figures for a year end document and went to save and a message appeared
saying document unable to save! why did this do this and how can i save it
without loosing my changes?