Error when exporting budget to Excel – The call to member Add failed. Microsoft Office Excel returned the following message: That name is not valid.

While exporting budget from nav 5.1 version system hit following error message

The call to member Add failed. Microsoft Office Excel returned the following message: That name is not valid.

Error hitting on  report 82 Export Budget to Excel Line ExcelBuf.CreateRange(ColumnDimCode[i]) Line

This is the standard Nav 5.1  report  bug and Microsoft has already fixed this issue on 2009 version , the problem occurs when exporting a dimension code that contains blank space (or special characters) ,  check the screenshot

Update the two lines to Nav 5.1  version object and export again.