I haven't tried this but it may work.
Open up your map in Design Studio.
Run the map and see if you experience the same error. Check for output. According to your post, you should see output.
Right click on the map to view "Map Settings"
Under Validation, change from "Standard" to "Custom"
Under OnValidationError, change from "Continue" to "Stop"
Recompile/Rebuild the map and see if you see the same error and any outputs.
Move the compiled map to either an external folder or the map respository referenced by WTXMapService.
The compiled map should have the new setting.
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Rex Chan
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