Simple way to understand SAP EWM exception handling is to know what and when these exceptions are occurred to execute. This blog post explains you the basic understanding of SAP EWM exception codes that we need to know for what business context that user/system looking for and when these execution steps are running.

SAP Help explains exception as below:
The exception code basically tells us an exception situation in the warehouse. This exception situation occurs, for example, if system returns data does not match up with the actual situation in the warehouse. You can use exception code to communicate this to the system. You can then, for example, simply save the information, or can use it to trigger the system to start follow-up actions. For this purpose, there are connections available to the SAP Workflow, to the SAP Alert Framework, and to SAP Status Management. (more…)