do not overwrite rt.start if it is already set
do not overwrite rt.start if it is already set

yahoo/boomerang,levexis/boomerang,forcedotcom/kylie,levexis/boomerang,sdgdsffdsfff/boomerang,FredXue/boomerang,sdgdsffdsfff/boomerang,lognormal/boomerang,FredXue/boomerang,lognormal/boomerang,forcedotcom/kylie