In my export plugin, if an export fails for some reason, I call
exportRendition:uploadFailed( "My very informative error message" )
and go on to process the next image.
My expectation is that my error message should be displayed on Lightroom's "Export Results" dialog that lists all of the failed exports. Instead the failed images show up under a non-senseical header like "640" (see attached screen shot). Does anyone know how this is supposed to work? If it matters, I'm running Lightroom 2.3 on a WinXP system.