OpenFlow0x01.ErrorSourceAn error message. See Section 5.4.4 of the OpenFlow 1.0 specification.
type c = | HelloFailed of HelloFailed.t| BadRequest of BadRequest.t| BadAction of BadAction.t| FlowModFailed of FlowModFailed.t| PortModFailed of PortModFailed.t| QueueOpFailed of QueueOpFailed.tEach error is composed of a pair (error_code, data)