Home : Runtime error 430: Class does not support Automation
Q10100 - ERRMSG: Runtime error 430: Class does not support Automation

When attempting to create a mail merge, Word opens and you recieve an error 'Runtime erorr 430: Class does not support Automation or doesn't support expected interface.

More Information
This error may occur when software attempts to access a database file by referencing libraries that are a different version than those installed on the computer.

After reinstall the Commence program or applying a patch file, it is possible to receive this error message.  Use the following steps to manually register the letters.dll :

  1. Use Explorer to locate a file called regsvr32.exe,
  2. Create a shortcut to the file & place it on the desktop. 
  3. Locate the Commence program directory.
  4. Drag the letters.dll file from the program directory to the regsrv32.exe shortcut on the desktop. 

You should receive a message stating the file has been successfully register.  Now attempt to create your mail merge again.

If the error continues:

  1. Using Windows Explorer, locate the CMCMERGE.DOT file in the Word Startup directory.  Right-click and select open.
  2. Open the VBA Editor using the ALT+F11 shortcut or the Tools - Macros - Visual Basic Editor command.
  3. Select Tools -References and locate the reference for Letters.dll.  De-select or remove the checkbox.  Select OK to close the dialog box.
  4. Select the Debug - Compile Project command.  We expect this will error out. Click OK to the message box.
  5. Use the Tools-References command and locate the reference for Letters.dll.  If there are multiple listings, verify the path to LETTERS.DLL is the proper one for your current Commence program directory. 
  6. Select Letters.dll so that a checkbox appears.
  7. Click OK to close the dialog box and select the Debug-Compile Project command. We expect no error should occur.
  8. Select File-Save in the VBA editor.  Select File - Close and Return to Word.
  9. Select File-Save in Word to save the CMCMERGE.DOT file.

If more than one PC is receiving this error, the modified cmcmerge.dot file may be copied to the remaining workstations

Applies To


Author: Commence
Tracking ID: 7-601177-Z 
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Approved Comments...
It is really helpful. thanx in advance Approved: Sunday, November 17, 2013
I used the advanced solution for my problem, and it worked! Thank you. Gerald Widlake Approved: Friday, February 22, 2008
I had to use the advanced information to solve my problem but the directions are very clear and it worked. Nice resource. Approved: Thursday, December 27, 2007
Thank you for the advanced information. -Tom Burkhart Approved: Thursday, September 13, 2007
Created on Wednesday, November 17, 2004.
Last Modified on Tuesday, August 17, 2010.
Last Modified by Commence.
Rated 7 out of 10 based on 14 votes.
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