diff --git a/pkg/doc.go b/pkg/doc.go
index e256eb3..9409421 100644
--- a/pkg/doc.go
+++ b/pkg/doc.go
@@ -1,14 +1,14 @@
 package pkg
 
 type Torrent interface {
-	Name() string
-	Progress() int
+	Name() (string, error)
+	Progress() (int, error)
 	Stop() error
 	Start() error
 	Remove() error
 	Save() string
 	Exists() bool
-	SeedRatio() *float64
+	SeedRatio() (float64, error)
 }
 
 
diff --git a/pkg/transmission/transmission.go b/pkg/transmission/transmission.go
index 09ddc2a..71e3b10 100644
--- a/pkg/transmission/transmission.go
+++ b/pkg/transmission/transmission.go
@@ -113,12 +113,15 @@ func (t *Torrent) reloadClient() error {
 	return nil
 }
 
-func (t *Torrent) getTorrent() transmissionrpc.Torrent {
+func (t *Torrent) getTorrent() (transmissionrpc.Torrent, error) {
 	r, err := t.c.TorrentGetAllForHashes(context.TODO(), []string{t.Hash})
 	if err != nil {
 		log.Errorf("get torrent info for error: %v", err)
 	}
-	return r[0]
+	if len(r) == 0 {
+		return transmissionrpc.Torrent{}, fmt.Errorf("no torrent")
+	}
+	return r[0], nil
 }
 
 func (t *Torrent) Exists() bool {
@@ -129,37 +132,50 @@ func (t *Torrent) Exists() bool {
 	return len(r) > 0
 }
 
-func (t *Torrent) Name() string {
-	if !t.Exists() {
-		return ""
+
+func (t *Torrent) Name() (string, error) {
+	tt, err := t.getTorrent()
+	if err != nil {
+		return "", err
 	}
-	return *t.getTorrent().Name
+	return *tt.Name, nil
 }
 
-func (t *Torrent) Progress() int {
-	if t.getTorrent().IsFinished != nil && *t.getTorrent().IsFinished {
-		return 100
+func (t *Torrent) Progress() (int, error) {
+	tt, err := t.getTorrent()
+	if err != nil {
+		return 0, err
 	}
-	if t.getTorrent().PercentComplete != nil && *t.getTorrent().PercentComplete >= 1 {
-		return 100
+	if tt.IsFinished != nil && *tt.IsFinished {
+		return 100, nil
+	}
+	if tt.PercentComplete != nil && *tt.PercentComplete >= 1 {
+		return 100, nil
 	}
 
-	if t.getTorrent().PercentComplete != nil {
-		p := int(*t.getTorrent().PercentComplete * 100)
+	if tt.PercentComplete != nil {
+		p := int(*tt.PercentComplete * 100)
 		if p == 100 {
 			p = 99
 		}
-		return p
+		return p, nil
 	}
-	return 0
+	return 0, nil
 }
 
 func (t *Torrent) Stop() error {
 	return t.c.TorrentStopHashes(context.TODO(), []string{t.Hash})
 }
 
-func (t *Torrent) SeedRatio() *float64 {
-	return t.getTorrent().UploadRatio
+func (t *Torrent) SeedRatio() (float64, error) {
+	tt, err := t.getTorrent()
+	if err != nil {
+		return 0, err
+	}
+	if tt.UploadRatio == nil {
+		return 0, nil
+	}
+	return *tt.UploadRatio, nil
 }
 
 func (t *Torrent) Start() error {
@@ -167,15 +183,22 @@ func (t *Torrent) Start() error {
 }
 
 func (t *Torrent) Remove() error {
-	tt := t.getTorrent()
+	tt, err := t.getTorrent()
+	if err != nil {
+		return errors.Wrap(err, "get torrent")
+	}
 	return t.c.TorrentRemove(context.TODO(), transmissionrpc.TorrentRemovePayload{
 		IDs:             []int64{*tt.ID},
 		DeleteLocalData: true,
 	})
 }
 
-func (t *Torrent) Size() int {
-	return int(t.getTorrent().TotalSize.Byte())
+func (t *Torrent) Size() (int, error) {
+	tt, err := t.getTorrent()
+	if err != nil {
+		return 0, errors.Wrap(err, "get torrent")
+	}
+	return int(tt.TotalSize.Byte()), nil
 }
 
 func (t *Torrent) Save() string {
diff --git a/server/activity.go b/server/activity.go
index e59095c..171c697 100644
--- a/server/activity.go
+++ b/server/activity.go
@@ -16,7 +16,7 @@ import (
 type Activity struct {
 	*ent.History
 	Progress  int     `json:"progress"`
-	SeedRatio float32 `json:"seed_ratio"`
+	SeedRatio float64 `json:"seed_ratio"`
 }
 
 func (s *Server) GetAllActivities(c *gin.Context) (interface{}, error) {
@@ -30,8 +30,18 @@ func (s *Server) GetAllActivities(c *gin.Context) (interface{}, error) {
 			}
 			for id, task := range s.core.GetTasks() {
 				if h.ID == id && task.Exists() {
-					a.Progress = task.Progress()
-					a.SeedRatio = float32(*task.SeedRatio())
+					p, err := task.Progress()
+					if err != nil {
+						log.Warnf("get task progress error: %v", err)
+					} else {
+						a.Progress = p
+					}
+					r, err := task.SeedRatio()
+					if err != nil {
+						log.Warnf("get task seed ratio error: %v", err)
+					} else {
+						a.SeedRatio = r
+					}
 				}
 			}
 			activities = append(activities, a)
@@ -73,7 +83,6 @@ func (s *Server) RemoveActivity(c *gin.Context) (interface{}, error) {
 		return nil, errors.Wrap(err, "db")
 	}
 
-
 	if his.EpisodeID != 0 {
 		if !s.db.IsEpisodeDownloadingOrDownloaded(his.EpisodeID) {
 			s.db.SetEpisodeStatus(his.EpisodeID, episode.StatusMissing)
@@ -108,7 +117,7 @@ func (s *Server) GetMediaDownloadHistory(c *gin.Context) (interface{}, error) {
 
 type TorrentInfo struct {
 	Name      string  `json:"name"`
-	ID        string   `json:"id"`
+	ID        string  `json:"id"`
 	SeedRatio float32 `json:"seed_ratio"`
 	Progress  int     `json:"progress"`
 }
@@ -127,10 +136,12 @@ func (s *Server) GetAllTorrents(c *gin.Context) (interface{}, error) {
 		if !t.Exists() {
 			continue
 		}
+		name, _ := t.Name()
+		p, _ := t.Progress()
 		infos = append(infos, TorrentInfo{
-			Name:     t.Name(),
+			Name:     name,
 			ID:       t.Hash,
-			Progress: t.Progress(),
+			Progress: p,
 		})
 	}
 	return infos, nil
diff --git a/server/core/integration.go b/server/core/integration.go
index ffffedf..b7b0fae 100644
--- a/server/core/integration.go
+++ b/server/core/integration.go
@@ -257,7 +257,11 @@ func (c *Client) findEpisodeFilesPreMoving(historyId int) error {
 	isSingleEpisode := his.EpisodeID > 0
 	downloadDir := c.db.GetDownloadDir()
 	task := c.tasks[historyId]
-	target := filepath.Join(downloadDir, task.Name())
+	name, err := task.Name()
+	if err != nil {
+		return err
+	}
+	target := filepath.Join(downloadDir, name)
 	fi, err := os.Stat(target)
 	if err != nil {
 		return errors.Wrapf(err, "read dir %v", target)
diff --git a/server/core/scheduler.go b/server/core/scheduler.go
index 4e7022f..efcd98d 100644
--- a/server/core/scheduler.go
+++ b/server/core/scheduler.go
@@ -63,24 +63,33 @@ func (c *Client) checkTasks() error {
 			delete(c.tasks, id)
 			continue
 		}
-		log.Infof("task (%s) percentage done: %d%%", t.Name(), t.Progress())
-		if t.Progress() == 100 {
+		name, err := t.Name()
+		if err != nil {
+			return errors.Wrap(err, "get name")
+		}
+
+		progress, err := t.Progress()
+		if err != nil {
+			return errors.Wrap(err, "get progress")
+		}
+		log.Infof("task (%s) percentage done: %d%%", name, progress)
+		if progress == 100 {
 
 			if r.Status == history.StatusSeeding {
 				//task already success, check seed ratio
 				torrent := c.tasks[id]
-				ok := c.isSeedRatioLimitReached(r.IndexerID, torrent)
+				ratio, ok := c.isSeedRatioLimitReached(r.IndexerID, torrent)
 				if ok {
-					log.Infof("torrent file seed ratio reached, remove: %v, current seed ratio: %v", torrent.Name(), *torrent.SeedRatio())
+					log.Infof("torrent file seed ratio reached, remove: %v, current seed ratio: %v", name, ratio)
 					torrent.Remove()
 					delete(c.tasks, id)
 				} else {
-					log.Infof("torrent file still sedding: %v, current seed ratio: %v", torrent.Name(), *torrent.SeedRatio())
+					log.Infof("torrent file still sedding: %v, current seed ratio: %v", name, ratio)
 				}
 				continue
 			}
-			log.Infof("task is done: %v", t.Name())
-			c.sendMsg(fmt.Sprintf(message.DownloadComplete, t.Name()))
+			log.Infof("task is done: %v", name)
+			c.sendMsg(fmt.Sprintf(message.DownloadComplete, name))
 
 			go c.postTaskProcessing(id)
 		}
@@ -122,7 +131,10 @@ func (c *Client) moveCompletedTask(id int) (err1 error) {
 		log.Errorf("get task download client error: %v, use default one", err)
 		downloadclient = &ent.DownloadClients{RemoveCompletedDownloads: true, RemoveFailedDownloads: true}
 	}
-	torrentName := torrent.Name()
+	torrentName, err := torrent.Name()
+	if err != nil {
+		return err
+	}
 
 	defer func() {
 
@@ -169,9 +181,9 @@ func (c *Client) moveCompletedTask(id int) (err1 error) {
 	c.sendMsg(fmt.Sprintf(message.ProcessingComplete, torrentName))
 
 	//判断是否需要删除本地文件
-	ok := c.isSeedRatioLimitReached(r.IndexerID, torrent)
+	r1, ok := c.isSeedRatioLimitReached(r.IndexerID, torrent)
 	if downloadclient.RemoveCompletedDownloads && ok {
-		log.Debugf("download complete,remove torrent and files related, torrent: %v, seed ratio: %v", torrentName, *torrent.SeedRatio())
+		log.Debugf("download complete,remove torrent and files related, torrent: %v, seed ratio: %v", torrentName, r1)
 		c.db.SetHistoryStatus(r.ID, history.StatusSuccess)
 		delete(c.tasks, r.ID)
 		torrent.Remove()
@@ -428,15 +440,15 @@ func (c *Client) checkSeiesNewSeason(media *ent.Media) error {
 	return nil
 }
 
-func (c *Client) isSeedRatioLimitReached(indexId int, t pkg.Torrent) bool {
+func (c *Client) isSeedRatioLimitReached(indexId int, t pkg.Torrent)(float64,bool)  {
 	indexer, err := c.db.GetIndexer(indexId)
 	if err != nil {
-		return true
+		return 0, true
 	}
-	currentRatio := t.SeedRatio()
-	if currentRatio == nil {
-		log.Warnf("get current seed ratio error, current ratio is nil")
-		return indexer.SeedRatio == 0
+	currentRatio, err := t.SeedRatio()
+	if err != nil {
+		log.Warnf("get current seed ratio error: %v", err)
+		return currentRatio, indexer.SeedRatio == 0
 	}
-	return *currentRatio >= float64(indexer.SeedRatio)
+	return currentRatio, currentRatio >= float64(indexer.SeedRatio)
 }