Microsoft Excel cannot access the file 'C:\test.xlsm'. There are several
possible reasons:

• The file name or path does not exist.
• The file is being used by another program.
• The workbook you are trying to save has the same name as a currently open
workbook.

Win32::OLE(0.1709) error 0x800a03ec
    in METHOD/PROPERTYGET "Open"