If the proper version of Excel is not installed on your computer, you will see the error OLE CreateObject Not Successful when you try to access an Excel spreadsheet from within ExtendSim. Possible causes of receiving this error are:

Excel is not installed on your computer.

Excel is installed on your computer, but the installation is damaged. In this case you will need to reinstall Excel.

click-to-run version of Excel is installed on your computer. This version does not support communication between outside applications such as ExtendSim and Excel. You will need to uninstall your click-to-run version of Excel and install a full version of Excel. Instructions for this can be found at support.microsoft.com/kb/982431