python.TrigValSteering.CheckSteps.CheckFileStep Node1 python.TrigValSteering.Check Steps.CheckFileStep + input_file + executable + args + log_file_name - __executables__ - __input_files__ + __init__() + configure() + run() Node2 python.TrigValSteering.Check Steps.InputDependentStep + input_file + result + __init__() + run() Node2->Node1 Node3 Step Node3->Node2