Hard fault exception when simulink model downloads code on keil mdk_arm toolchain

I am generating optimsed code using simulink coder for LMS filter using stm32f4VG407 discovery board,KEIL MDK-ARM, but upon single conversion of signal through ADC , it is stopping at hardfault handler. fault report: MM_FAULT_STAT:0x00 BUS_FAULT_STAT:0x04 i.e. IMPRECISERR IS HIGH USG_FAULT_STAT:0x000 HARD_FAULT_STAT:0x4000000 i.e.FORCED IS HIGH DBG_FAULT_STAT:0x00000001 i.e. HALTED IS HIGH

I am using Matlab 2013b & MDK_ARM 4.74 please help me how to get rid of this.