PureMessage for Microsoft Exchange: error 1603 'Error applying transforms'

  • Article ID: 25579
  • Rating:
  • 7 customers rated this article 4.9 out of 6
  • Updated: 06 Mar 2014


When you try to upgrade or remove PureMessage for Microsoft Exchange, you receive the error

Error 1603 - 'Error applying transforms. Verify that the specified transform paths are valid'.

This error message refers to a file called 1033.MST.

First seen in
PureMessage for Microsoft Exchange


The temp folder has been cleared out sometime in the past, and this has since removed a file called 1033.MST which is mentioned in the registry.

What To Do

You will need to edit the Windows registry.

  1. Open Regedit
  2. Browse to HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\
  3. Right-click the value 'Transforms' and select 'Modify'. This displays a value similar to: C:\DOCUME~1\user account\LOCAL~1\Temp\_is87\1033.MST
  4. Delete the contents of the Value data field.
  5. Run the upgrade or uninstall again.

If you need more information or guidance, then please contact technical support.

Rate this article

Very poor Excellent