You cannot close Microsoft Office Word until the Send Mail command is finished.
Switch to the New Message first, and either send or close the message.
This error can occur if you try to send a Word document using the Mail Recipient (as Attachment) (File menu - Send To option) command. If Word hangs, or you closed Word and a new message dialog does not appear, it is possible Outlook did not receive the request to start a new message.
To avoid this issue, restart Word and attempt to send the attachment again but wait for Outlook to respond prior to attempting another action.
"More information about this error message online.
Microsoft Office 2003
Vendor: Microsoft Corporation
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