diff --git a/Debug/ps7/start_amp_session.sh b/Debug/ps7/start_amp_session.sh
index 80ac39a..3933fd6 100755
--- a/Debug/ps7/start_amp_session.sh
+++ b/Debug/ps7/start_amp_session.sh
@@ -24,7 +24,7 @@ P1_PORT=$((10000+$RANDOM))
 P2_TITLE=ARM_AMP_CORE0
 P3_TMP=/tmp
 P4_SYS=/tools/lauterbach/r_2018_02
-P9_TCF="$((20000+$USER_ID_SUFFIX))"
+P9_TCF="$((20000+$RANDOM))"
 
 if [[ ! ${1} ]]; then
   echo "Please specify lauterbach hostname"
diff --git a/skript.pdf b/skript.pdf
index 81b4f18..e858368 100644
Binary files a/skript.pdf and b/skript.pdf differ
diff --git a/src/Modules/genericTaskset/src/gt_core.c b/src/Modules/genericTaskset/src/gt_core.c
index 5e54810..c7c4a6b 100644
--- a/src/Modules/genericTaskset/src/gt_core.c
+++ b/src/Modules/genericTaskset/src/gt_core.c
@@ -36,6 +36,7 @@ static void _GT_RunableLoop (GT_TASK_T *pMyOwnTask) __attribute__ ((always_inlin
 /**
  * Weak functions for hooks that are not implemented
  */
+__attribute__((weak)) void GT_TaskActivationHook(GT_TASK_T *pMyOwnTask) {(void)pMyOwnTask;return;} 
 __attribute__((weak)) void GT_TaskStartHook(GT_TASK_T *pMyOwnTask) {(void)pMyOwnTask;return;}
 __attribute__((weak)) void GT_TaskEndHook(GT_TASK_T *pMyOwnTask){return;}
 __attribute__((weak)) void GT_RunableStartHook(GT_TASK_T *pMyOwnTask){(void)pMyOwnTask;return;}
@@ -43,6 +44,7 @@ __attribute__((weak)) void GT_RunableEndHook(GT_TASK_T *pMyOwnTask){return;}
 __attribute__((weak)) void GT_TaskSwHook (GT_TASK_T *pMyOwnTask){return;}
 __attribute__((weak)) void GT_InitHook(GT_INIT_T * pInit){return;}
 __attribute__((weak)) void GT_StopHook(void){return;}
+__attribute__((weak)) void GT_TaskMissHook(GT_TASK_T *pMyOwnTask) {(void)pMyOwnTask;return;}
 __attribute__((weak)) volatile void GT_CalibrateStartHook(void){return;}
 __attribute__((weak)) volatile void GT_CalibrateEndHook(void){return;}
 
@@ -83,7 +85,9 @@ inline static void _GT_TaskLoop(GT_TASK_T *pMyOwnTask)
 		/*
 		 * Call task start hook
 		 */
+		OS_ENTER_CRITICAL();
 		GT_TaskStartHook(pMyOwnTask);
+		OS_EXIT_CRITICAL();
 		/*
 		 * Determine CET
 		 */
@@ -95,7 +99,9 @@ inline static void _GT_TaskLoop(GT_TASK_T *pMyOwnTask)
 		/*
 		 * Call task end hook
 		 */
+		OS_ENTER_CRITICAL();
 		GT_TaskEndHook(pMyOwnTask);
+		OS_EXIT_CRITICAL();
 		/*
 		 * Increment sequence number
 		 */
@@ -347,9 +353,19 @@ void GT_Stop(void)
 }
 
 void GT_ActivateTask(CPU_INT08U id){
+	CPU_SR cpu_sr;
+	GT_RT_VAL_T *internal = &GT_TaskTable[id].Internal;
 	if(GT_TaskTable[id].ActivationType != GT_ACT_OFF){
-		OSQPost(GT_TaskTable[id].Internal.pActQ,(void *)0);
-		GT_TaskTable[id].Internal.ActCounter++;
+		OS_ENTER_CRITICAL();
+		GT_TaskActivationHook(&GT_Tasks[id]);
+		OS_EXIT_CRITICAL();
+		if(internal->ActCounter != internal->SeqNr){
+			OS_ENTER_CRITICAL();
+			GT_TaskMissHook(&GT_Tasks[id]);
+			OS_EXIT_CRITICAL();
+		}
+		OSQPost(internal->pActQ,(void *)0);
+		internal->ActCounter++;
 	}
 }