diff --git a/lib/errors.h b/lib/errors.h
index 1b86d29..3a4a766 100755
--- a/lib/errors.h
+++ b/lib/errors.h
@@ -15,11 +15,13 @@
 #define NAPI_UNLOADLIB_FAIL 5012 // 释放的库未被加载
 #define NAPI_LUAFUN_NOFOUND 5013 //调用不符合规定，没有遵守单入参单出参约定
 #define NAPI_LUA_STACK_ERROR 5014 //函数调用时，栈大小小于约定最小大小
-#define NAPI_LUA_INITFAIL 5015 //lua状态机初始化错误
+#define NAPI_LUA_INITFILE 5015 //lua状态机初始化错误
 #define NAPI_LUALIB_LOAD_OVER_STACK 5016 //加载太多lib
 #define NAPI_LUA_CLASS_LOST 5017 //luarunner对象丢失
 #define NAPI_LUA_MISS_REDIRECT 5018 //漏传用于重定向的文件路径
 #define NAPI_RESET_INPUT_FILE_ERROR 5019 //重置输入文件失败，可能造成输入污染
-#define NAPI_ERROR_FUNCS 5020
+#define NAPI_ERROR_FUNCS 5020 //函数调用错误
+#define NAPI_CHDIR_ERROR 5021 //切换工作目录失败，可能导致包搜索错误，日志写入路径错误等
+#define NAPI_NOCHUNK_FOUND 5022 //没有找到待调用的函数
 
 #endif
\ No newline at end of file
diff --git a/lib/lua_runner.cpp b/lib/lua_runner.cpp
index 068726e..4b6a791 100755
--- a/lib/lua_runner.cpp
+++ b/lib/lua_runner.cpp
@@ -168,57 +168,44 @@ int Lua_runner::clean()//进行新一轮调用前一定要先clean清除上个
 //TODO 支持更多类型的参数 
 int Lua_runner::run(const char *path,const char *arg)
 {
-    if(!this->check_luastatue())
+    if(!this->check_luastatue())//检查lua状态机状态
+        return -1;
+       
+    if(path != NULL)//加载脚本到栈
     {
+        if(this->load_lib(path,path) != 0)
+            return -1;
+    }
+    if(arg != NULL)//压参数入栈
+    {
+       lua_pushlstring(this->L,arg,strlen(arg));
+    }
+    if(this->pkg_cont<0)//检查是否有可调用chunk
+    {
+        errno = NAPI_NOCHUNK_FOUND;
         return -1;
     }
-    if(path !=NULL){
-        if(luaL_loadfile(this->L, path) != LUA_OK) {
-            const char *err = lua_tostring(this->L, -1);
-            this->reslt = err ? err : "load error";
-            errno = NAPI_SCRIPT_ERROR;
-            lua_pop(this->L, 1); // 清理栈上的错误信息
-            return -1;
-        }
-    }
-    else{
-        this->pkg_cont--;
-    }
-    if(arg !=NULL)//压栈参数
-        lua_pushstring(this->L,arg);
-    if(lua_type(L, -1) == LUA_TFUNCTION)
+    int argcount = lua_gettop(this->L) - this->pkgs[this->pkg_cont-1].ref;//获取入参数量
+    if(argcount<0)
     {
-        if(lua_pcall(this->L,0,1,0) !=LUA_OK)//若栈顶为函数，直接调用
-        {
-            const char *ret = lua_tostring(this->L, -1);
-            this->reslt = ret;//存储返回值
-            errno =NAPI_SCRIPT_ERROR;
-            return -1;
-        }
+        errno = NAPI_LUA_STACK_ERROR;
+        return -1;
+    }//检查参数数量
+    if(lua_pcall(this->L,argcount,LUA_MULTRET,0)== LUA_OK)
+    {
+        if(lua_isstring(this->L,-1))
+            this->reslt = lua_tostring(this->L,-1);
+        this->pkg_cont--;
+        return 0;
     }
     else
     {
-        if(lua_pcall(this->L,1,1,0) !=LUA_OK)//执行
-        {
-            const char *ret = lua_tostring(this->L, -1);
-            this->reslt = ret;//存储返回值
-            errno =NAPI_SCRIPT_ERROR;
-            return -1;
-        }
+        errno = NAPI_SCRIPT_ERROR;
+        this->reslt = lua_tostring(this->L,-1);
+        this->pkg_cont--;
+        lua_pop(L,1);//错误出栈
+        return -1;
     }
-    const char *ret = NULL;
-    if(!lua_isstring(this->L,lua_gettop(this->L)))
-    {
-        if(lua_gettop(this->L)<2)//后续不会再有调用
-        {
-            errno = NAPI_SCRIPT_BAD_RET; 
-            goto NO_RETURN;
-        }
-    }
-    ret = lua_tostring(this->L, -1);
-    this->reslt = ret;//存储返回值
-NO_RETURN:
-    return 0;
 }
 //TODO 实现函数调用 achieve func call via file
 /*
diff --git a/src/bridge.cj b/src/bridge.cj
index 882b597..cc7a16f 100644
--- a/src/bridge.cj
+++ b/src/bridge.cj
@@ -90,6 +90,8 @@ public class LuaError <: Exception {
             case 5018 => "Missing redirect file path"
             case 5019 => "Reset input file failed, may cause input pollution"
             case 5020 => "Error in callback functions"
+            case 5021 => "change workdir error"
+            case 5022 => "Calling func no found"
             case _ => "Unknown error"
         }
     }