Christopher Williams wrote [last month, admittedly]:
> if you click the down arrow next to the green run button (looks like a 
> play button), it'll drop down. Select "Run..." and you should see all 
> the launch configurations that have been created. You can select the 
> Environment tab and choose Interpreter to select which one to run with.

Hmmm... Using Callisto 3.2, I don't see an Interpreter option under 
Environment.  In fact, I don't see a Run... at all - I was going to 
External Tools to see the Main/Refresh/Environment/Common tabs.

Seems like there are a few potential ways to launch a Ruby application 
with RDT:

1. I can launch a .rb script directly by right-clicking it and selecting 
Run As > Ruby Application (Alt-Shift-X, R).  This seems to use the 
currently selected interpreter from Preferences / Ruby.

2. I can launch an .rb test by right-clicking and selecting Run As > 
Test::Unit Tet (Alt-Shift-X, U).  This seems to use the FIRST 
interpreter in that list, whether or not it's checked.

3. I can run an "external tool", such as the Webrick server that's 
configured in the NAPCS Rails on Windows howto. That explicitly 
specifies the path of ruby in the "Location" field of the Main: tab.

4. If I'm using RadRails, I can create a RadRails "WEBrick server" 
definition.  I have no idea which interpreter is used either initially 
or how to change it (if I can); the command line doesn't appear in the 
output file as it does with methods #1 and #2.

Chris, were your instructions for 3.1?  Which of these four methods 
would they have applied to?

Jay


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