Hi,
Thanks for your reply,
The report is running correctly from the portal or from report studio.
The smtp server is set in IBM cognos configuration/Notification. The test succeed.
Cognos send the email only if i select the chekbox 'the link of the report'.
Ican't find anything about this class : AttachmentPart.
can it be an old version of this class which is causing the problem?
Many thanks.