diff --git a/core/service.go b/core/service.go
index 98474f5ae..2d8e5c0c4 100644
--- a/core/service.go
+++ b/core/service.go
@@ -48,7 +48,7 @@ func NewService() *Service {
 	service.WebService = NewWebService(service)
 	service.Index = index.NewFragmentContainer()
 	service.Hold = hold.NewHolder()
-	service.version = "0.0.23"
+	service.version = "0.0.24"
 	service.name = "Cruncher"
 	service.PrepareLogging()
 	fmt.Printf("Pilosa %s\n", service.version)
diff --git a/index/brand.go b/index/brand.go
index 3c40f26a5..b6d8ffe2d 100644
--- a/index/brand.go
+++ b/index/brand.go
@@ -201,7 +201,9 @@ func (self *Brand) TopN(src_bitmap IBitmap, n int, categories []uint64) []Pair {
 
 	}
 
-	return self.TopNCat(src_bitmap, n, is)
+	test := self.TopNCat(src_bitmap, n, is)
+	log.Println("TOPN:", test)
+	return test
 }
 func dump(r RankList, n int) {
 	for i, v := range r {
diff --git a/index/fragment_container.go b/index/fragment_container.go
index a863f2f36..2e409bd67 100644
--- a/index/fragment_container.go
+++ b/index/fragment_container.go
@@ -134,7 +134,7 @@ func (self *FragmentContainer) TopN(frag_id SUUID, bh BitmapHandle, n int, categ
 		SendTimer("fragmant_container_TopN", result.exec_time.Nanoseconds())
 		return result.answer.([]Pair), nil
 	}
-	return nil, nil
+	return nil, errors.New(fmt.Sprintf("Fragment not found:%s", SUUID_to_Hex(frag_id)))
 }
 
 func (self *FragmentContainer) GetList(frag_id SUUID, bitmap_id []uint64) ([]BitmapHandle, error) {