Returning a Tcl list to TestStand

Hi,
I wonder if anyone can help me. I would like to return the contents of a Tcl list to TestStand. I am not sure how to go about it. Are Tcl lists equivalent to an array in TestStand? Can I return the entire list or must I return each individual element? I also noticed that the custom TclParameter type can be modified. Should I create an array of strings to catch the list being returned from Tcl.
Any help would be appreciated.
Thanks

A Tcl list is very similar to an array in TestStand. There are some minor differences when dealing with multi-dimensional lists (lists of lists), but the concept is pretty similar. The Tcl Example currently on the web does not support lists and all parameters must be strings. You would then have to parse the string returned as the list in order to make an array.
For example, if you have a Tcl list x created with": set x [1 2 3 4]". If you set an output parameter on the step to map to the variable x to Locals.ListAsString in TestStand, it would be populated with "1 2 3 4". You would have to then split the string based on spaces, and you could convert it into an Array in TestStand.
Do not modify the TclParameter type (unless you also want to change the source code of the rest of the step). Changing the source code for the step type would be an advanced topic, so unless you are experienced in TestStand and the Tcl C API, I wouldn't recommend it.
Allen P.
NI

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