Every developer needs to debug every now and then.
But it becomes a challenge when you didn’t wrote every line of code.
Maybe an addon will case the problem.
Default NAV or a CU update can also be the reason.
Or the combination of these.
So where do you begin? First you start debugging and break just before you press the function that causes the problem.
Then you follow every line of code in the debugger. Jump from one codeunit to another. Very time consuming.