Your working folder contains a writable copy of <File>

This error has the following cause and solution:

You have a writeable file on your disk not checked out to you, and you've done a Get.

Select one of the options presented. Leave the file, replace it, check out the old version while keeping the changes, check out the old version while merging the changes, or cancel the get.

Note: To avoid this message in the future, disable this notification on the Files tab that is accessed by selecting Options from the Tools menu.