How to force SequenceFi​leUnload callback to run from within operator interface

Question

I need to force SequenceFileUnload callback to run from within operator interface arbitrary, with possibility to control execution flow.
I.e. discarding object handle of execution object, which has client sequence file, which has SequenceFileUnload callback, causes it(SequenceFileUnload callback) to run. Unfortunately, after discarding execution object handle, it can be used to control execution flow(pausing, aborting, terminating).

Answer 1

Thanks for the clarification. Here are the answers to your 3 questions:
1) You can programmatically run any sequence (including callbacks) by using the TestStand API Engine.NewExecution() method.
2) The Execution API object has several control methods for breaking, aborting, terminating, restarting, etc... All you need to do is obtain a reference to the Execution you want to perform one of these actions on and call the appropriate method on the reference. If you start the SequenceFileUnload callback with the Engine.NewExecution method, this returns a reference to the Execution object that you can call these methods on. If you don't use the NewExecution method, you can do a check in your UIMsg event handler for the StartExecution UIMsg event
for an execution starting that is running the SequenceFileUnload callback, and simply manipulate the Execution reference the UIMsg contains as you see fit.
3) To disable the SequenceFileUnload callback for a sequence file that is currently loaded. You can set the SequenceFile API object property "UnloadCallbackEnabled" to FALSE, and the callback will not execute for that file when it is unloaded unless you go back and reset the property to true before unloading. Note this property is reset each time you load the file.
For more information on the TestStand API objects, methods, and properties discussed in this post, refer to the TestStand Programmer Help accessed through the Sequence Editor's Help >> TestStand Programmer Help menu selection.
Jason F.
Applications Engineer
National Instruments
www.ni.com/ask