error on building and upload

What would cause this - searched the web and couldnt find

Generating triggers for “InitiateConflictCheckProcess”…
Error: Build of process “InitiateConflictCheckProcess” failed. Please check the log file for more information.
at com.webmethods.process.generator.TriggerGenerator.cleanUpEmptyPackages(
at com.webmethods.process.generator.Trigger

Since this is about building a process, I would recommend posting this question under Business Process Management (BPM) forums