I am having trouble using the pxCourseofSales.Unsubscribe function which keeps crashing in VBA. I successfully subscribe to some security’s course of sales, which keeps feeding back data as expected. If I subsequently want to subscribe to another Security and first call the Unsubscribe function, it crashes. Sometimes it gives an “access violation error” but usually it gives no error at all. Do I have to do anything before calling the function? What is the correct usage of the function?