Function Call on left-hand side... error

There must be something stupid obvious about this that I'm just...missing.

I'm getting this error:
"Compile Error: Function call on left-hand side of assignment must return Variant or Object"

Here's a snippet of my code that's giving the error:

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This is stripped down version the code, so I could isolate the error...it's supposed to use the "Loc" variable as a Lookup value once I figure out why it's giving me this error...

Any help is much appreciated!

nothing is declared ><. Silly me.

declaring Loc as String did the trick

@ SeanDamnit

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Thanks.

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