I am continually frustrated with the documentation structure around Errors and Warnings. When ever a geoprocessing tool fails you normally get a error or warning number. In the tool reference section of the online documentation there needs to be a complete list of the error and warning numbers with some greater details about these errors so we can avoid them. Yes you get a link to the help documentation which doesn't always work.
I recently came across the example below where I was looking for some more details about the error message I was getting and when I searched for the warning number with or with out the WARNING text I got 0 results. If they do exist in the documentation library then these articles need to be tagged with the error numbers.