Hi All! We made a communication via UART2 using two functions: 1. Tx_task - who prepares the frame and initiates the transmission; 2. UART2 Interrupt Subroutine (on reception only) - in which we send/receive the data; In the Interrupt Sub. every time we receive a byte we send an event to Tx_Task. Almost 2 years this functionality work without any problem on STR711FR1 CPU. Now we migrate this UART2 functionality source code to STR912FW44. The code and the functions are identical. But now sending of this Event from Int.Sub. to Tx_Task (every time a byte is received) makes CPU to Reset (not immediately but after several events sent to Tx_Task). (UART2 baud rate is 9600bps, no FIFO, 8 data bits no parity) Is this a problem in RTX or we make someting incorrect? Thanks in advance:-)