Was the error 63195 or -63195? (The negative sign matters.)
If I do Help >> Explain Error for -63195 it says "The handle for device communication is invalid or has been closed. Restart the application."
I don't know if that means is an error withing your LabVIEW code itself, or if it is an error in the communication between the cRIO and your host PC that is connected to the cRIO. I'm leaning towards the latter.
I would start troubleshooting by creating a simple project, perhaps something that blinks the User Status LED and deploy that. See if you get the error. If you do, then it probably indicates a problem with the hardware.
You probably saw the Status LED was normal.
There is also a User Status and an FPGA Status. User Status might be called User1.
In the RealTime RTU Utilities palette, there is a VI called RT LEDs.vi that allows you to control the on off status of the user LED on the cRIO.
For the FPGAStatus LED, I believe you can get to that one as a node within FPGA code, but I don't have a project to refer to at the moment where I used that LED.