diff --git a/embysim.tar.xz b/embysim.tar.xz
index 970e16a..45351ad 100644
Binary files a/embysim.tar.xz and b/embysim.tar.xz differ
diff --git a/runembysim.sh b/runembysim.sh
index 79b7a84..85a389a 100644
--- a/runembysim.sh
+++ b/runembysim.sh
@@ -41,7 +41,13 @@ url=$(cat rclone.conf |grep -E "^url"|sed -e 's/.*\(http.*\)/\1/'|head -1)
 echo "get webdav url from rclone:$url"
 curl -v -L $url
 if [ $? -eq 0 ]; then
-	echo "WARN:webdavsim is running, data may be outdate."
+	iswebdavsim=$(curl -v -L $url -o - 2>&1|grep "Path-Based WebDAV Server"|wc -l)
+	if [ $iswebdavsim -gt 0 ]; then
+		echo "WARN:webdavsim is running, data may be outdate."
+	else
+		echo "ERROR: $url is NOT WebDAVSim, exit"
+		exit
+	fi
 else
 	echo "run webdavsim..."
 	chmod u+x tmuxrunwebdavsim.sh