One of the best debugging tools is to consider the application layers. Item 2 in the list "Stabilize, Isolate, and Minimize" touches on this, but to be more spe

One of the best debugging tools is to consider the application layers. Item 2 in the list "Stabilize, Isolate, and Minimize" touches on this, but to be more specific: consider your system as a call-stack or as an application stack. Can you find the last place in the system where things work as expected?