Endevor error messages and codes used to be documented in the "Messages and Code Reference" Guide, but starting with Endevor 17.0 all the documentation has been moved to the online Docops platform.
How to search for Endevor error messages and codes on the Docops platform?
If you tried searching for an Endevor error code on the top left 'Search this product' box on the Docops page, you might have noticed that the search will show no results. This is because Endevor error messages and codes are stored separately on the platform. The right way to perform this search is to use the dedicated search box for messages and codes, described on the 'Message and Code Reference' section:
Where is the documentation for CA Endevor V18? TEC1279571