diff --git a/hgdriver/hgdev/hg_scanner.cpp b/hgdriver/hgdev/hg_scanner.cpp
index 8aac3af..fe6c31b 100644
--- a/hgdriver/hgdev/hg_scanner.cpp
+++ b/hgdriver/hgdev/hg_scanner.cpp
@@ -2442,9 +2442,10 @@ int hg_scanner::setting_get_devs_log(void* data, long* len)
 		return SCANNER_ERR_NO_DATA;
 	}
 	string str;
-	get_device_log(str);
-	strcpy((char*)data, str.c_str());
-	return 0;
+	int ret = get_device_log(str);
+	if(ret == SCANNER_ERR_OK)
+		strcpy((char*)data, str.c_str());
+	return ret;
 }
 int hg_scanner::on_color_mode_changed(int& color_mode)
 {