In the Error Checking window, you can see the information about the job that you have selected in the Job Scheduler Overview. For example, the ID of the job and the description, information about the object that carries out the job and the result of the last time the job scheduler ran the job.
In this window, you can run the job directly to see which error message the program displays when running the job.
For Help about a specific field, click the field and press F1.