I have an excel spreadsheet that includes a macro that involves selecting a work sheet in order to perform a number of functions. For some reason when the macro reaches the line to select the work sheet I keep getting the error message: "Run-time error '57121': Application-defined or object-defined error". I have tried numerous ways to get it to work but it does not. Only when I manually select the work sheet and then run the rest of the code does it work. Could someone please help with this?