I see that value for parameter "Name" is empty. If you fill it with "0,1", it will work as you expect. Thanks for finding this issue!
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in general more online help would be helpful - like html links / tooltips ... for the entries. It's not so intuitive what "command string" is for ...
And yes, a "nothing happens" on click is bad IMHO - I would expect a message box "pls fill in values field ..."