Hi @zp001 ,
As per prototype of Std_ReturnType Fee_Write(uint16 BlockNumber, const uint8 *DataBufferPtr), the buffer data needs to be constant. So please add "const" keyword before data buffer in the definition:
const uint8 DataBlock0[4] = {0x00,0x01,0x02,0x03};
const uint8 DataBlock1[4] = {0xaa,0xbb,0xcc,0xdd};