Does a probe accept char or string variable?

[Akiko Ogawa - RS/GIS lab]

I would like to input the output file name as a variable through a probe.
But it seems the probe cannot accept any character.
Would you please advise if there is a way to input char or string variable in a 
probe?

Many Thanks.


-------------------------------------------
Akiko Ogawa
Department of Geography and Earth Resources
Utah State University
address@hidden
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