use double analog output as reward

Hi Jaewon,
I am working on a paradigm that needs to deliver double line of reward. However, limited by the NI card type, all the digital outputs are assigned for other usages, and there are only 2 analog output left. While the {reward} could only be assigned to a single Analog Output at a time. I wonder if there is any suggestions or ideas for this situation?
Hope for your reply, thanks!

Get a parallel port card. It costs just $20 to $30 and provides 12 digital output lines.
https://monkeylogic.nimh.nih.gov/board/read.php?2,1004,1004#msg-1004

See this page about how to install the parallel port driver.
https://monkeylogic.nimh.nih.gov/docs_GettingStarted.html#AdditionalLibraries

Thank you! Could you please just do slightly modification on the reward assignment, so that the {reward} could be assigned to more than one analog outputs rather than solely being assigned to the digital ports.

No. Analog output channels cannot be individually controlled, unlike digital lines. It is not a slight modification.