Run All Tests gives error message, individual tests work

Sep 28, 2013 at 3:54 PM
Edited Sep 28, 2013 at 3:55 PM
Hei there, as stated in the Subject,

when i ran individual tests in the test explorer they run without problems (also when running all tests from a specific test object) however if i click run all it gives me this error message:
An exception occurred while invoking executor 'executor://pythontestexecutor/v1': Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt.
the german part means that the object link was not assigned to an object instance