Rose Ann,
A couple of Questions:
* What version of DMM & DMD are you using?
* Are the presentations in question, New or Existing presentations
that experience the unable to save issue?
* Were you editing the presentation and then go idle for a period of
time and then come back make some changes and try to save and then
get the error?
* Have you looked at the syslogs after this type of error?
* If the prezo is "existing" and you have a problem saving, close the file
and then open it again. Make a change and retry saving it and see what happens.
* how often does this occur and when do you think this symptoms started to occur?
Thanks!
T.