Cannot check out an old version of a file

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The Check Out command always uses the most recent version of a file. This error has the following cause and solution:

• You are trying to check out an old version of a file.

To use and modify a previous version

1. Check out the most recent version of the file.
   
   
2. Delete it from your working folder (not the VSS database).
   
   
3. Get the old version that you want to modify.
   
   
4. Make your changes to the old version. (This may require removing its read-only flag manually.)
   
   
5. Check the modified file into VSS.

Note   You can also use the Rollback button in the History of File dialog box (on the Tools menu, click Show History). If you roll back to a certain version, all versions subsequent to that version are deleted. You can then check out the file and start modifying it. The disadvantage of this method, however, is that you lose all the subsequent versions, and cannot retrieve them.