diff --git a/src/iflytop/components/zcanreceiver/zcanhost.cpp b/src/iflytop/components/zcanreceiver/zcanhost.cpp
index f682711..d24fdf8 100644
--- a/src/iflytop/components/zcanreceiver/zcanhost.cpp
+++ b/src/iflytop/components/zcanreceiver/zcanhost.cpp
@@ -67,7 +67,7 @@ void ZCanHost::initialize(string can_if_name, int baudrate, bool enablLoopback)
   };
   m_cmdMap["sleep_ms"] = [this](int argc, char** argv, string& retval) {
     CHECK_ARGC_NUM(1);
-    uint8_t ms = atoi(argv[1]);
+    int32_t ms = atoi(argv[1]);
     logger->info("sleep_ms:{}", ms);
     std::this_thread::sleep_for(std::chrono::milliseconds(ms));
     return true;
diff --git a/src/iflytop/core/error/error_code.cpp b/src/iflytop/core/error/error_code.cpp
index 292dcfc..0ac7298 100644
--- a/src/iflytop/core/error/error_code.cpp
+++ b/src/iflytop/core/error/error_code.cpp
@@ -19,6 +19,7 @@ using namespace std;
 // kuser_not_exist
 static vector<error_code_desc_t> ecode_desc_set = {
     {kce, kovertime, "overtime"},
+    {kce, kfail, "fail"},
     {kce, knoack, "noack"},
     {kce, kdevice_offline, "kdevice_offline"},
     {kce, kparse_json_err, "kparse_json_err"},
diff --git a/src/iflytop/core/error/error_code.hpp b/src/iflytop/core/error/error_code.hpp
index de59acd..b38b37a 100644
--- a/src/iflytop/core/error/error_code.hpp
+++ b/src/iflytop/core/error/error_code.hpp
@@ -18,6 +18,7 @@ namespace err {
 using namespace std;
 typedef enum {
   kovertime = 1,
+  kfail,
   knoack,
   kdevice_offline,
   kparse_json_err,