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If none of the measures failed but the datapoint failed, then it is likely due to a fatal error in the EnergyPlus simulation; however you said it runs smoothly in EnergyPlus directly. Look at the epllusout.err file in your datapoint and see what the fatal error is. If the IDF file itself is fine, then it is possible the weather file wasn't setup correctly in OpenStudio but was when you ran the IDF through EPLaunch.