diff --git a/cmd/joj3/main.go b/cmd/joj3/main.go
index 88ef7ec..8e68b62 100644
--- a/cmd/joj3/main.go
+++ b/cmd/joj3/main.go
@@ -49,7 +49,11 @@ func generateStages(conf Conf) []stage.Stage {
 		var cmds []stage.Cmd
 		for _, optionalCmd := range s.Executor.With.Cases {
 			cmd := s.Executor.With.Default
-			copier.Copy(&cmd, &optionalCmd)
+			err := copier.Copy(&cmd, &optionalCmd)
+			if err != nil {
+				slog.Error("generate stages", "error", err)
+				os.Exit(1)
+			}
 			cmds = append(cmds, cmd)
 		}
 		if len(s.Executor.With.Cases) == 0 {
diff --git a/internal/executors/sandbox/convert.go b/internal/executors/sandbox/convert.go
index 9798602..b61fe0e 100644
--- a/internal/executors/sandbox/convert.go
+++ b/internal/executors/sandbox/convert.go
@@ -129,17 +129,6 @@ func convertPBFile(i stage.CmdFile) *pb.Request_File {
 	return nil
 }
 
-func convertAbsPath(cmdFile *stage.CmdFile) error {
-	if cmdFile.Src != nil && !filepath.IsAbs(*cmdFile.Src) {
-		absPath, err := filepath.Abs(*cmdFile.Src)
-		if err != nil {
-			return err
-		}
-		cmdFile.Src = &absPath
-	}
-	return nil
-}
-
 func convertPBResult(res []*pb.Response_Result) []stage.ExecutorResult {
 	var ret []stage.ExecutorResult
 	for _, r := range res {