Closes a session you create by using the CAN Create Interface VI. This VI closes the session regardless of whether an error has occurred in a preceding operation or not. Use this VI to release memory before starting a new session or to discard all elements in the transmit queue or the receive queue.

interface object in specifies the refnum of the interface to close.
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
error out contains error information. This output provides standard error out functionality.