diff --git a/build.sh b/build.sh
index 18aed16..362395e 100755
--- a/build.sh
+++ b/build.sh
@@ -237,6 +237,10 @@ if [ -d "dpkg/$syspath/$oem/usr/lib" ];then
 		cp release/$syspath/$cpu/libsane-"$oem"sane.so     	dpkg/$syspath/$oem/usr/lib/$libpath/sane/libsane-"$oem"sane.so.1
 	fi
 	
+	if [ $? != 0 ];then
+		echo "-----------------cp libsane fail ,not find libsane-----------------"	
+	exit 1
+fi
 	echo "11111111111111111111111111111111111111111111111111111"
 	sleep 3
 fi