Symptom
Failed to connect to the running Unity Editor or standalone build.
Error(s)
In the test, you may see:
System.Exception: Failed to connect to localhost:19734 ---> System.Exception: Unable to locate any UnityEditor instances with a GDIOAgent configured.
In the Unity Editor console, or Player.log file (for standalone execution):
Only one usage of each socket address (protocol/network address/port) is normally permitted.
UnityEngine.Debug:LogError (object)
gdio.unity_agent.GDIOLogger:Error (object)
gdio.unity_agent.GDIOAgent:Awake ()
Solution(s)
One or more of the following may be occurring:
| Possible cause | Solution |
| Multiple instances of the Unity Editor are open, causing port 19734 to be taken/listening. | Be sure to close all except the active editor used for testing. |
| The GameDriver agent is attached to more than one open scene. | Only attach the GameDriver agent to one scene in your project. Typically this is the first scene to be loaded. |
Symptom
Test terminates during the OneTimeSetUp stage.
Error(s)
In the test, you may see:
OneTimeSetUp: System.NullReferenceException : Object reference not set to an instance of an object.
The Unity console and Player.log may show no errors.
Solution(s)
One or more of the following may be occurring:
| Possible cause | Solution |
| Under investigation. Please email us at support@gamedriver.io if this occurs consistently/frequently. | Close and reopen the Unity Editor/project. |