Error 202 may occur when the connection to MoonRay is broken.
If The USB is still connected but you get this error after slicing, try the following steps:
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Turn off MoonRay and close RayWare.
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Unplug USB cable from your computer.
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Turn on MoonRay and open RayWare.
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Plug the USB cable back in to your computer.
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Try printing your model again.