diff --git a/conf/wide.go b/conf/wide.go
index 7d38c19..c0c63c9 100644
--- a/conf/wide.go
+++ b/conf/wide.go
@@ -67,7 +67,6 @@ type conf struct {
 	MaxProcs              int     // Go max procs
 	RuntimeMode           string  // runtime mode (dev/prod)
 	WD                    string  // current working direcitory, ${pwd}
-	Workspace             string  // path of master workspace
 	Locale                string  // default locale
 	Users                 []*User // configurations of users
 }
@@ -148,19 +147,6 @@ func (c *conf) GetUserWorkspace(username string) string {
 	return ""
 }
 
-// GetWorkspace gets the master workspace path.
-//
-// Compared to the use of Wide.Workspace, this function will be processed as follows:
-//  1. Replace {WD} variable with the actual directory path
-//  2. Replace ${GOPATH} with enviorment variable GOPATH
-//  3. Replace "/" with "\\" (Windows)
-func (c *conf) GetWorkspace() string {
-	w := strings.Replace(c.Workspace, "{WD}", c.WD, 1)
-	w = strings.Replace(w, "${GOPATH}", os.Getenv("GOPATH"), 1)
-
-	return filepath.FromSlash(w)
-}
-
 // GetGoFmt gets the path of Go format tool, returns "gofmt" if not found.
 func (c *conf) GetGoFmt(username string) string {
 	for _, user := range c.Users {
@@ -359,11 +345,11 @@ func UpdateCustomizedConf(username string) {
 	}
 }
 
-// initWorkspaceDirs initializes the directories of master workspace, users' workspaces.
+// initWorkspaceDirs initializes the directories of users' workspaces.
 //
 // Creates directories if not found on path of workspace.
 func initWorkspaceDirs() {
-	paths := filepath.SplitList(Wide.GetWorkspace())
+	paths := []string{}
 
 	for _, user := range Wide.Users {
 		paths = append(paths, filepath.SplitList(user.GetWorkspace())...)
diff --git a/conf/wide.json b/conf/wide.json
index 1a3f4ec..a3eb60e 100644
--- a/conf/wide.json
+++ b/conf/wide.json
@@ -11,7 +11,6 @@
     "MaxProcs": 4,
     "RuntimeMode": "dev",
     "WD": "${pwd}",
-    "Workspace": "${GOPATH}",
     "Locale": "en_US",
     "Users": [
         {
@@ -31,6 +30,6 @@
                 "Files": [],
                 "CurrentFile": ""
             }
-        }        
+        }
     ]
 }
\ No newline at end of file
diff --git a/file/files.go b/file/files.go
index 1c4f994..84ff8a3 100644
--- a/file/files.go
+++ b/file/files.go
@@ -345,7 +345,14 @@ func listFiles(dirname string) []string {
 
 	// sort: directories in front of files
 	for _, name := range names {
-		fio, _ := os.Lstat(filepath.Join(dirname, name))
+		path := filepath.Join(dirname, name)
+		fio, err := os.Lstat(path)
+
+		if nil != err {
+			glog.Warningf("Can't read file info [%s]", path)
+
+			continue
+		}
 
 		if fio.IsDir() {
 			// exclude the .git direcitory
diff --git a/output/outputs.go b/output/outputs.go
index 943b152..9dfcd7e 100644
--- a/output/outputs.go
+++ b/output/outputs.go
@@ -846,10 +846,9 @@ func StopHandler(w http.ResponseWriter, r *http.Request) {
 
 func setCmdEnv(cmd *exec.Cmd, username string) {
 	userWorkspace := conf.Wide.GetUserWorkspace(username)
-	masterWorkspace := conf.Wide.GetWorkspace()
 
 	cmd.Env = append(cmd.Env,
-		"GOPATH="+userWorkspace+conf.PathListSeparator+masterWorkspace,
+		"GOPATH="+userWorkspace,
 		"GOOS="+runtime.GOOS,
 		"GOARCH="+runtime.GOARCH,
 		"GOROOT="+runtime.GOROOT(),