Reference the object expected found execution

I have a .NET DLL that has a method that takes a parameter of reference an object of type NationalInstruments.TestStand.Interop.API.Execution. In TestStand 4.2.1 it worked well if I spent it RunState.Execution.

Now in 2010 TestStand I get an error in TestStand that the method expects an object reference, but found a writ of execution. A performance, that's what I want is what describes the method. Then, why this doesn't work?

Anyone have any ideas?

Thank you.

Skeptical salvation,

It is a known backwards compatibility problem introduced in 2010 TestStand and will be fixed in a later version.

That said, is not really meaningful for the parameter as byref (i.e. input/output) in this case, execution is already a type of reference data interface. Thus, passing byref implies that the method has the possibility of replacing the object that points to RunState.Execution with another object of execution that very probably is not something of the method would make ever.

To work around this problem, you can do the following:

(1) changing the prototype of the method (or add a new overload) to take the run by value setting (i.e. only), which is probably what that the author of the code really the intention anyway.

Or

(2) create a local variable of type object reference and assign RunState.Execution before your call to the method, and then pass the local variable for the byref parameter.

Please let us know if you have any questions or if workarounds are not enough for you.

Hope this helps,

-Doug

Tags: NI Software

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