If you’re encountering the error message „Excel cannot insert the sheets into the destination workbook,” it means that Excel is having trouble copying or moving sheets from one workbook to another. This issue can occur for various reasons, but there are several potential solutions you can try:

1. Check for Compatibility: Ensure that both the source and destination workbooks are compatible with the version of Excel you are using. Sometimes, older or newer Excel file formats may not be fully compatible.
2. Check for Workbook Protection: Make sure that neither the source nor the destination workbook is protected with a password or restricted access. Workbook protection can prevent sheets from being inserted or copied.
3. Check for Read-Only Mode: Ensure that neither workbook is open in „Read-Only” mode. In this mode, you can’t make changes to the workbook.
4. Check for Macros or VBA Code: If either workbook contains macros or VBA (Visual Basic for Applications) code, there might be code that interferes with copying or moving sheets. Review and potentially disable any macros or code temporarily to see if it resolves the issue.
5. Try Different Methods: Instead of using the standard „Move or Copy Sheet” feature, try a different method to copy or move the sheets. You can right-click on the sheet tab, choose „Move or Copy,” and then select the destination workbook. Alternatively, you can try copying the sheet by right-clicking on the tab and selecting „Copy,” then go to the destination workbook and right-click on a sheet tab and select „Insert Copied Sheets.”
6. Check for File Corruption: If one of the workbooks is corrupted, it can lead to issues when copying or moving sheets. Try opening both workbooks and checking for any error messages indicating file corruption. If corruption is detected, consider restoring from a backup or creating a new workbook.
7. Recreate the Destination Workbook: In some cases, creating a new workbook as the destination and copying the sheets into it can resolve the issue. Open a new workbook and try copying the sheets there.
8. Check for Formula References: Ensure that the sheets being copied do not contain external references (e.g., links to other workbooks or data sources). External references can sometimes cause issues when copying or moving sheets.
9. Update Excel: Ensure that you are using the latest version of Microsoft Excel. Updating to the latest version may resolve compatibility issues and bugs that could be causing the problem.
10. Consider Excel Add-Ins: If you have any Excel add-ins or third-party extensions installed, they may be interfering with the copy/move operation. Try disabling them and attempt to copy/move the sheets again.

If none of these solutions resolve the issue, it’s possible that there may be an underlying problem with your Excel installation or the specific files you are working with. In such cases, you may want to contact Microsoft Support for further assistance.