During the creation of any matrix reports in viflow, the error message "SaveAs method of the workbook object could not be executed" occurs. No Excel file opens with the selected matrix.
Access protection settings in Excel cause this error message. To change this, the settings in Excel must be adjusted under Options in the Trust Center settings. Go to the File Block Settings and allow Excel to open and save Excel 97-2003 workbook and templates. The matrix reports can then be created again in viflow.