TIdPop3 error msg : 'Error saving attachement'

When retrieve my messages with TidPop3 (and tIdMsg of course) from a pop
server with Indy9.0.10 components, (Delphi5 Ent)
sometimes i have an error 'Error Saving Attachement' ...
is there any pb (or bug) with the retreiving of attachements in delphi ?????
anybody can hel p ????,
thanks