if the problem still occurs after registering the mscomctl.ocx-component you could run the attached VB-script.
The script checks if necessary components for the Excel-report are installed.
Please send the result and a detailled problem description to the official WinCC OA support.
how to reach the ETM Support is described at the following entry at the ETM Portal
Home --> FAQ --> General --> How can I reach the ETM Support?
Which information is required is described at
Home --> FAQ --> General --> Which information is necessary to open a service request for the WinCC OA support?
Please notice that the ETM Portal does not substitute the common WinCC OA support.
The output for the VB-script describes that 2 necessary components are not installed or registered.
Best Regards
Leopold Knipp
Senior Support Specialist