Update run.csx
Update run.csx

Improved error handling
rfennell/vNextBuild,ChrisLGardner/vNextBuild,rfennell/vNextBuild,rfennell/vNextBuild,ChrisLGardner/vNextBuild,ChrisLGardner/vNextBuild,rfennell/vNextBuild,ChrisLGardner/vNextBuild