Checkout the entire project containing this file version?

This warning has the following cause and solution:

• You are attempting to check out an older version of a file from the project history window. 

  Click Yes to check out all the files in the project at the version you selected. 

  Click No to check out only the file version you selected.

Note   If you are looking at the recursive history of a higher-level Project and you attempt to check out an earlier version of a file in a subproject, you must select the Recursive check box in the Check Out <filename> dialog box.  Otherwise, the file will not get checked out.