That error relates to the use of identifiers that aren't recognized in the current context. Be sure that you're incorporating the UnityEngine assembly ( i.e. using UnityEngine; ) if your script is in C#.

If you are, then please post a code snippet of the code section that's throwing that error.

also having the same issue. tried the fix posted to no avail.
"error CS0103: The name `GUI' does not exist in the current context"

are there any other suggestions?

thanks

sorry GOT IT WORKING- just realized i needed to import the UnityEngine at the beginning of the script:

using UnityEngine;

Thanks for the report! It looks like you've found a Unity 3.5-specific bug.

It seems that Unity 3.5 isn't saving custom inspector settings in the same way Unity 3.4 did. There's a simple fix:

Open the Editor/QCAR/Scripts/TrackerEditor.cs script.

Add the following to the end of the OnInspectorGUI method (after the #endif):

if (GUI.changed)
{
    // Let Unity know that there is new data for serialization.
    EditorUtility.SetDirty(tb);
}

Let us know if that helps. We'll fix this in the next release.

- Kim