There is a known issue with our version of Blackboard that if a question in a test is set to 0 points running the item analysis will fail. I know that there will be very few questions that will ever have 0 points however there is another cause. From the tests that we have been told the item analysis has failed the questions are linked from a pool. The pool questions are set to 0 points and since the question in the test is linked to that pool question running the item analysis will fail. To know if your questions are link you will see this icon next to the question.
Unfortunately, there is not currently a fix for this from blackboard and trying edit the pool question will not fix the issue and allow the item analysis to run. Right now the best thing to do is to check your tests and if you see the icon above and you know what pool the questions come from. Check that pool and edit the questions if they are set to 0. If you do not know what pool the questions are in we can help you to find the questions. We apologize for this inconvenience.