Basically, this error is telling you that one of your data files is more recent the the information in the control file.

If you are copying these datafiles while the database is up, the sequeuce of things is important.
1. Copy all the data files
2. Force a log switch n times where n= the number of redo logs you have.
3. copy all redo logs
4. copy all archived redo logs
5. copy 1 control file
6. copy the control file from step 5 to the other locations where it should reside.

This way, the control file will be the latest and greatest. You will have to recover the database, but all datafiles are older than your control file.