Hi Vinay,I had a problem like this : when i was enabling a RTC interrupt on my STR912, my software was reseting after 3-4-6 hours of running… I don’t know if you are in this case or not…Maybe the following thread could help you:http://sourceforge.net/forum/forum.php?thread_id=2116003&forum_id=382005OtherWise: the usual problem of stack overflow could be interesting to check, if not already done…I write the following code to look the memory usage of each task, the function is the following (this function locate in the stack the last: 0xa5a5a5a5)(To use it, you need to cut – copy the structure definition: tskTCB to a *.h file to ‘export’ the type)(UTILS_TRACE_STACK is used as a printf function (vsprintf) to send debug info to an hyperterminal)Another thing you can check is the stack available in IRQ mode.Regards.Damien/** ************************************************************************************** * fn u8 UTILS_PrintStackUsage (xTaskHandle TaskHandle) * brief This function will print (trough RS232) information about stack usage on a dedicated task ************************************************************************************** * ************************************************************************************** * return Always 0 ************************************************************************************** */u8 UTILS_PrintStackUsage (xTaskHandle TaskHandle){ tskTCB *TaskStack = (tskTCB*)TaskHandle; u32 *CurrentCell; if (TaskHandle != NULL) { //print direct available info UTILS_TRACE_STACK2('—- %s —-',TaskStack->pcTaskName); UTILS_TRACE_STACK3('Stack Start – End : 0x%.8x – 0x%.8x',TaskStack->pxStack,TaskStack->pxTopOfStack); // init the current memory cell on the beginning of the task CurrentCell = TaskStack->pxStack; while ( (*CurrentCell 0xa5a5a5a5)&& (CurrentCell <= TaskStack->pxTopOfStack)) { CurrentCell++; } UTILS_TRACE_STACK3('Stack size: %i, Lowest free space ava. %i',(TaskStack->pxTopOfStack – TaskStack->pxStack),(CurrentCell – TaskStack->pxStack)); } return (0);}