An embodiment of the invention may include a method, computer program product and system for data transfer. The embodiment may include receiving, by a relay node, a data payload from a data sending program intended for a data receiving program. The embodiment may include determining whether the received data payload is numeric data or non-numeric data based on a payload length associated with the received data payload. The embodiment may include creating a corrected data payload by performing at least one cognitive correction to the non-numeric data payload based on determining that the received data payload contains non-numeric data. The embodiment may include transmitting the corrected data payload.