Try installing your VC 4.3 again. 4.3 robots have action script which uses module from application’s installation folder. This module is located at “C:\Program Files\Visual Components\Visual Components Premium 4.3\Python\Commands\ActionScript\action_script.py”. The module delivered with VC installer should contain function “OnFinalize”. The error you are getting says that such a function does not exist. This would imply that the module has been replaced for some reason.
If the problem persist please contact your local reseller or VC support to get help for the issue.
Thank you, I mistakenly replaced the file when installing the extension component