Case statment not working?!?!?

[Wadenut]

That does tell me there are some extraneous characters in your string. HS wouldn't show these in the log if they're HTML tags or otherwise unprintable characters.
Just out of curiosity, try:

hs.writelog("Test", "This is parameter X: " & X.ToString & " " & Len(X.ToString))
hs.writelog("Test", "This is parameter Y: " & Y.ToString & " " & Len(Y.To String))

The Length of X reported likely won't match the visible string.

[joegr]

Does it pass an array or an object?

An array, unlike HomeSeer itself.

[sparkman]

I am using the "HomeSeer: Run a HomeSeer script with values from elements(s)" function

That last one wouldnt run at all just an error.

Looks like the End Sub was not pasted into my code.