Executing a user selected portion of an executable graph, the method includes, for an executable graph, the executable graph comprising executable modules, identifying a user selected sub-portion of the executable graph. The method further includes determining that data is needed from upstream modules in the graph to execute the sub-portion of the executable graph. The method further includes obtaining the needed data. The method further includes executing the user selected sub-portion of the graph in isolation from other portions of the executable graph. This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.