diff --git a/source/sysak.c b/source/sysak.c
index e84551bc5d9971e3bed06c1b0dde318ce45f1630..d35373e7650291ec4c51e8d4d87379fc295c02cc 100644
--- a/source/sysak.c
+++ b/source/sysak.c
@@ -62,6 +62,9 @@ static void mod_ctrl(bool enable)
     bool has_ko = false;
     char modinfo[MAX_SUBCMD_ARGS];
 
+    if (access(system_modules,0) != 0)
+        return;
+
     modlist_fp = fopen(system_modules, "r");
     if (!modlist_fp){
         printf("open %s failed\n", system_modules);
@@ -122,6 +125,9 @@ static void print_each_tool(char *path)
     char buf[MAX_NAME_LEM + MAX_SUBCMD_ARGS];
     char tools_name[MAX_NAME_LEM];
 
+    if (access(path,0) != 0)
+        return;
+
     fp = fopen(path, "r");
     if (!fp){
         printf("open %s failed\n", path);
@@ -148,6 +154,9 @@ static bool tool_lookup(char *path, char *tool)
     FILE *fp;
     char buf[MAX_NAME_LEM + MAX_SUBCMD_ARGS];
 
+    if (access(path,0) != 0)
+        return false;
+
     fp = fopen(path, "r");
     if (!fp){
         printf("open %s failed\n", path);
diff --git a/source/tools/detect/loadtask/loadtask.sh b/source/tools/detect/loadtask/loadtask.sh
index b4f7d1de318d4297989d826a2e99dc3c019df5f0..6d3d9b13858801526f91dffb1994bf11ae9d30af 100755
--- a/source/tools/detect/loadtask/loadtask.sh
+++ b/source/tools/detect/loadtask/loadtask.sh
@@ -168,7 +168,9 @@ show_result() {
 collect_global_framegraph() {
 	if [ -f  $TOOLS_ROOT/cpu_flamegraph ]; then
 		$TOOLS_ROOT/cpu_flamegraph -d 5 | xargs -I {} sudo cp {} $global_cpuflamegraph
-		sudo cp $global_cpuflamegraph $tmp_cpuflamegraph
+		if [ -e $global_cpuflamegraph ];then
+			sudo cp $global_cpuflamegraph $tmp_cpuflamegraph
+		fi
 	fi
 }
 
@@ -186,7 +188,11 @@ current_analyse() {
 	echo "####################################################################################" > $tmpfile
 
 	echo "Time: `date "+%Y-%m-%d %H:%M:%S"`" >> $tmpfile
-	echo "$global_cpuflamegraph" >> $tmpfile
+	if [ -e $global_cpuflamegraph ];then
+		echo "$global_cpuflamegraph" >> $tmpfile
+	else
+		echo "Failed to generate cpu flamwgrapg" >> $tmpfile
+	fi
 	load_proc=`cat /proc/loadavg`
 	load_proc="load_proc: $load_proc"
 	echo "$load_proc" >> $tmpfile
@@ -301,6 +307,7 @@ current_analyse() {
 	echo >> $tmpfile
 	echo "####################################################################################" >> $tmpfile
 	cat ${tmp_cpuflamegraph} >> $tmpfile
+	rm ${tmp_cpuflamegraph}
 }
 
 history_analyse() {