>I have an unknown set of variables that will be in scope in a function and will have a common prefix. How can I identify all of the variables and get their values (actually, all I need are the values)? I played around with using “save to” function but I feel like I’m missing something obvious.
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>The vars will all have “chk_” as the prefix: chk_DCW, chk_SIR
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>Thanks,

I have a very strong impression that the whole issue could - and should - be circumvented by some design change. While I don't know exactly what you need those many variables for, some options might include:

Have an array. Each element can replace a variable.

Have a string in memory. Each line might replace a variable, or you might use another convenient separator, such as a semicolon.

Probably there are other ways, too, such as as XML, with which I have no experience. But perhaps you should tell a little more, where do those variables come from, what do you do with them, etc.

Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)