Modification required in the code line which finds the Last column

Dear Friends,

I get an error message:
The Error 91 (Object variable not set) appears when executed & debugged in the following line.

LastColumn = Cells.Find(What:="*", After:=[A3], SearchOrder:=xlByColumns, SearchDirection:=xlPrevious) _
        .Column

Basically, the above line finds the last used column to execute further. In the workbook, the first column is hidden.

As my data sheet is already designed, I need to select the columns A:CY only. I don't want to extend the selection further to select the data. But Rows may vary.

Or, any other reason for the above Error?

Please help me to modify the code.

Thanks in advance.

acsishere.