mxs-auart mxs-auart.1: Unhandled status 520400

[LKGerhard]

Hi,

I'm using imx233-OLinuxIno-MAXI board to develop interface with a RFID module. The application works fine, but sometimes, in intermittent intervals, occurs the error "mxs-auart mxs-auart.1: Unhandled status 520400", this error appears while the embedded application is sending and receiving serial data. Some suggestions? This can be wrong configuration of serial? I searched several sites and did not understand the problem.