If the output type is HTML, PostScript, or PDF, one stage in the conversion process runs the Arbortext Publishing Engine formatter. Normally, minor errors in the formatting process are ignored, as Arbortext Publishing Engine attempts to correct minor errors and continue processing.

If you specify return-formatter-errors=yes and formatter warning or error messages are issued, then the conversion process stops processing and returns an XHTML document with a return code of 500 and a list of the errors.

Errors and warning from PTC Advanced Print Publisher (PTC APP) are sent to the event log, which is returned to the client during publishing on the Arbortext PE server.