There are several reasons why you can't copy the worksheet to another, which include: The copied worksheet contains unsupported features or elements that are incompatible with the destination workbook. The source workbook or worksheet may be password protected, making copying impossible. The destination worksheet may have read-only rights, which prevents any changes or additions. A software or compatibility issue could impede the copying process. Check for any limits or conflicts, establish compatibility between workbooks, remove password protection if appropriate, and seek technical support if necessary to remedy the issue.