The correlation matrix is constructed by using the CORREL function in Excel. This error could be due to this functin not being available in the version of Excel that you are running. Which version of Excel and regaional language are you using?
Troubleshooting StepsStart Microsoft Excel.On the Menu Bar select "File" > "[Excel] Options" > "Trust Center" > "Trust Center Settings..." > "Macro Settings"In the top section, select the radio button for "Disable all macros with notification"