no texture memory available to upload ?

anyone know what that means? its down in the left hand corner next to a red exclamation mark

Occasional Error messages do pop up in Unity at some point. It is impossible for Unity to test every gameObject arrangement, file arragment, etc. to make sure no error messages appear. If they did, they would have made every game.

You should be able to ignore the error. However, if it is a real problem, then you should probably report a bug using the built in error reporter or email support@unity3d.com