Message - The file_name file was created in TestComplete 3. You should convert the file with TestComplete 15 before opening it in TestExecute 15.

This message is displayed if the project suite or project file you are opening in TestExecute was created in TestComplete 3. TestExecute 4 and later cannot work with these files. However, you can use TestComplete 4 and later to convert this file to the new format and then open the resulting file in TestExecute. To learn more about converting TestComplete project suites and projects, see TestComplete Documentation.