diff --git a/web/lib/tasks/mobile.rake b/web/lib/tasks/mobile.rake
index 1f639153b..d1162270d 100644
--- a/web/lib/tasks/mobile.rake
+++ b/web/lib/tasks/mobile.rake
@@ -78,36 +78,37 @@ namespace :mobile do
         Z: [],
       },
       artists_sections: {
-        '#': [],
-        A: [],
-        B: [],
-        C: [],
-        D: [],
-        E: [],
-        F: [],
-        G: [],
-        H: [],
-        I: [],
-        J: [],
-        K: [],
-        L: [],
-        M: [],
-        N: [],
-        O: [],
-        P: [],
-        Q: [],
-        R: [],
-        S: [],
-        T: [],
-        U: [],
-        V: [],
-        W: [],
-        X: [],
-        Y: [],
-        Z: [],
+        '#': {},
+        A: {},
+        B: {},
+        C: {},
+        D: {},
+        E: {},
+        F: {},
+        G: {},
+        H: {},
+        I: {},
+        J: {},
+        K: {},
+        L: {},
+        M: {},
+        N: {},
+        O: {},
+        P: {},
+        Q: {},
+        R: {},
+        S: {},
+        T: {},
+        U: {},
+        V: {},
+        W: {},
+        X: {},
+        Y: {},
+        Z: {},
       }
     }
-    
+
+    by_artist = {}
     CSV.foreach(tmp_fname) do |row|
       jtartist = row[0]
       jtname = row[1]
@@ -128,30 +129,26 @@ namespace :mobile do
       }
       jtx_json[:jtx_data_map][jt.id] = jtdata
 
-      begin
-
-      [[jtartist[0], jtx_json[:artists_sections]],
-       [jtname.sub('(','')[0], jtx_json[:songs_sections]]].each do |obj|
-        
-        first_char = obj.first.upcase
-        if (1..9) === first_char.to_i || '0' == first_char
-          obj.last[:'#'] << jt.id
-        else
-          obj.last[first_char.to_sym] << jt.id
-        end
+      first_char = jtartist[0].upcase
+      idx = ((1..9) === first_char.to_i || '0' == first_char) ? :'#' : first_char.to_sym
+      artists = jtx_json[:artists_sections][idx]
+      unless artists[jtartist]
+        artists[jtartist] = [jt.id]
+      else
+        artists[jtartist] << jt.id 
       end
-      rescue
-        puts "ERROR:  #{$!}: jtname=#{jtname}; jtartist=#{jtartist}"
-      end
-    end
-
-    jtx_json[:songs_section_idx] = jtx_json[:songs_sections].keys.collect do |key|
-      { key: key, data: [], count: jtx_json[:songs_sections][key].count }
+      
+      first_char = jtname.sub('(','')[0].upcase
+      idx = ((1..9) === first_char.to_i || '0' == first_char) ? :'#' : first_char.to_sym
+      jtx_json[:songs_sections][idx] << jt.id
     end
 
     jtx_json[:artists_section_idx] = jtx_json[:artists_sections].keys.collect do |key|
       { key: key, data: [], count: jtx_json[:artists_sections][key].count }
     end
+    jtx_json[:songs_section_idx] = jtx_json[:songs_sections].keys.collect do |key|
+      { key: key, data: [], count: jtx_json[:songs_sections][key].count }
+    end
 
     File.open("#{Rails.root}/tmp/jtx_indices.json", 'w') do |ff|
       ff.write jtx_json.to_json