How to turn off/on triggering within same IMAQ session

I put together an image acquisition application with a NI 1427 frame grabber and a Basler Aviator camera. I want to be able to switch between continuous (non-triggered) acquisition and triggered (acquisition is not running during the switch).
I can switch from continuous to triggered without reconfiguring the IMAQ session by using the IMAQ Configure Trigger3 VI. However, to go back to non-triggered mode, I tried calling the Configure Trigger3 VI with "Disabled" as the Action but that gave me a "Requested triggering mode is invalid error". I also tried using "Software Trigger" as the Type and that gave me the same error. Is there no way to turn off triggering without reconfiguring the entire IMAQ session?
Thank you for any input.
Vadim

Hi Kira,
Thank you for the response. I tried what you suggested but received an error stating that this was not a valid attribute. So I looked in MAX and saw that I have 2 Camera attributes (I think based on my icd file) and they are Bit Depth and Triggering. The Triggering attribute does have a "Free Run" value which I tried using with the IMAQ Set Attribute VI (with Camera Attribute = Triggering). I had no error but the frame grabber was also not acquiring images, i.e., the IMAQ session was originally in triggered mode and it seems that it was still waiting for an external trigger. 
Vadim

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