How do I pass parameters modified by the SequenceFileLoad callback?

I have some parameters in a sequence file that I want modified based on where the test station is located. I do not have that much experience with callbacks and have been reading up but wanted to reach out to the community as well. I know now that whatever is modified in the SequenceFileLoad callback is not passed onto the main sequence as it has not been started at this point. So what I am trying to do is have the operator choose a test facility once and have the parameters set and not have to choose everytime the sequence is initiated. I basically want the paramters set once, like when the fle is opened, and then it is done. Any help in how to implement this would be greatly appreciate.
Thanks,
Troy

Happy to help out! I created an example which is attached to this message. This is what it does:
In SequenceFileLoad, it first checks to see if StationGlobals.TestFacility exists, and if not, it creates that variable.
If the StationGlobal is set to "" (blank string), a prompt is displayed for the user to enter the facility. A post-expression on the Message Popup step sets the StationGlobals.TestFacility variable with this value.
When you execute MainSequence after loading the file, the current TestFacility is displayed.
The code could be simplified a bit if you can guarantee that StationGlobals.TestFacility will always exist as a variable. For example, the #NoValidation tags you see in some of the expressions are there because the StationGlobal may not exist prior to runtime. You could create the station global on your dev machine and deploy StationGlobals.ini to all test machines to ensure all machines have the variable and not need that part of the code, but I prefer the dynamic method because it won't cause an error if the station global is deleted for some reason.
I hope this helps clarify things a bit, and let me know if you have any questions about it!
Daniel E.
TestStand Product Support Engineer
National Instruments
Attachments:
TestFacility_2010.seq ‏8 KB

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