RFC error , group : . A BAPI error has occurred in the function module . A BAPI interface internal error has occurred at , parameter 2: . Encountered an invalid argument. Encountered an invalid connection handle. Unable to initialize the RFC. Encountered an error in the RFC program. Encountered an network and communications error. A SAP logon error has occurred. A SAP system exception was raised. Unable to call the SAP module. The resource is not available. An RFC protocol error occurred. An RFC internal error occurred. The RFC registered server was cancelled. The SAP system is busy. Unable to perform the RFC CallReceive. Unable to find the function object. Unable to find the parameter object. Unable to set the parameter. Encountered a pointer error. The axis number is invalid. The function module name is missing. The RFC logon is expired. No Return parameter is available at the function module . The RFC table function ItAppLine failed. The RFC table function ItCpyLine failed. The RFC table function ItCreate failed. The RFC table function ItDelete failed. The RFC table function ItDelLine failed. The RFC table function ItFill failed. The RFC table function ItFree failed. The RFC table function ItCreate failed. The RFC table function ItGupLine failed. The RFC table function ItInsLine failed. The RFC table function ItLeng failed. The RFC table function ItPutLine failed. An RFC parameter error occurred.