Where lives the logic for the types of flow control step?

For most types of step, the behavior of the type of the step is determined entirely by the configuration of the stage - that is to say, the properties that can be configured in the window type, such as the properties of the step, steps, etc..  But as far as I know, the behavior of the control flow step types (for example, hop, back at the beginning of a block of loop after a late stage) does not seem to be defined by a lower level, flag, attribute or any other configuration item - it seems to be something inherent to the motor TestStand.

If this is the case, how the TestStand engine knows to provide the functionality for a particular flow control step type?  It runs the appropriate logic based on the name of the step type?  I suspect that this may be the case, because if I create new types of step in copying the types of step ForEach and end without any changes other than to specify the new name for the beginning of the block and end step types, new types of step repeat not the loops as expected.

Can someone clear this up for me?  Types of flow control step break the model completely define the features by changing the type of step, or I am simply not find relevant configuration items?  I tried to create a new type of end step that allows an expression pre, but it broke my step ForEach (new) type loopback functionality.  Is it possible to do what I want?

You are right that the engine processes specially the flow control measures. He looks at the name of step type. If you want the same behavior execution, you must keep the original name of type step as a prefix on your step type name, such as NI_Flow_End_CustomizedByMe.

Also, check out the http://forums.ni.com/t5/NI-TestStand/copy-of-NI-Flow-End-does-not-work/m-p/290170/highlight/true#M88...

There is the source code that is similar to what the engine makes the steps of flow control. That was the actual code before it moved into the engine. It might be a bit outdated now. I found this on my machine in C:\Program Files (x 86) \National Instruments\TestStand 2010\Components\StepTypes\FlowControl\

Tags: NI Software

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