Welcome to the Board!
If there is any pattern to the way the sheets are named, you may be able to use INDIRECT formulas in Excel.
Otherwise, you may need to use VBA.
So I think we need more detail, such as:
- What are the names of the sheet your wish to copy?
- What range are you copying from?
- What sheet you are copying to?
- What range are you copying to?
- Are there any sheets other than these 49 in your workbook?