Equisys technical notes

Technical guidance, explanations and fixes for our products

PRB: Outlook locks messages when opening more than once



ID: ZTN1940

This Zetafax technical note applies to:

  • Zetafax 2012 Platform Feature Pack
  • Microsoft Outlook versions 2013 and 2010


When a .msg file is opened more than once in Outlook with the Zetafax add-in installed, an error message is displayed. (Cannot open file xxx.msg. The file may not exist, you may not have permission to open it, or it may be open in another program.)


The Zetafax add-in initializes some items that are displayed in the window in which the .msg is loaded. When the window is closed some items are not released correctly, thus, when the same .msg file is opened again, Outlook gives an error that the file is already open.


This issue has been resolved in the Windows Client Update for Zetafax 2012 available here. This is free of charge to customers with a Software Assurance contract which is current at the time of release. Please note: To install the update you must have first installed the Zetafax 2012 Platform Feature Pack.


This behaviour was corrected in the above mentioned update.

Last updated: 4thOctober 2013 (WK/MW)

Keywords: file may not exist outlook locking message

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