Problem Statement

Installing the Microsoft Excel ribbon-based Aspen InfoPlus.21 Process Data COM Add-in produces the error message "AspenTech.PME.ExcelAddin.ProcessData.dll is not a valid Office Add-in."

Solution

To work around this problem:

1.     Make sure you have read/write access to the registry.  The COM-based add-ins modify registry settings.

2.     Check for the file Microsoft.office.interop.excel in C:\Windows\Assembly. If this file is not there,  go to Microsoft's web site and download the file depending on the version of Excel.

3.     Download the file exceladdin_regasm.txt to exceladdin_regasm.bat and execute the batch file from a Windows command window.

4.     Finally download addin.reg.txt to addin.reg and execute the command "reg import addin.reg" from a Windows command window.

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