diff --git a/ext/export/src/oddbdat.rb b/ext/export/src/oddbdat.rb
index cb16cde..6fc9cae 100644
--- a/ext/export/src/oddbdat.rb
+++ b/ext/export/src/oddbdat.rb
@@ -420,7 +420,8 @@ module ODDB
 					11	=>	galform,
 					12	=>	conc,
 					13	=>	unit,
-					16	=>	@package.parts.first.multi,
+					#16	=>	@package.parts.first.multi,
+					16	=>	@package.parts.first ? @package.parts.first.multi : '',
 					17	=>	comform,
 					18	=>	qty,
 					19	=>	qty_unit,
diff --git a/src/model/package.rb b/src/model/package.rb
index 718233b..7b028a3 100644
--- a/src/model/package.rb
+++ b/src/model/package.rb
@@ -131,7 +131,7 @@ module ODDB
       comparables.uniq
     end
     def comparable_size
-      @parts.collect { |part| part.comparable_size }.inject { |a, b| a + b }
+      @parts.collect { |part| part.comparable_size }.inject{ |a, b| a + b } or raise RuntimeError
     rescue RuntimeError
       @parts.inject(Dose.new(0)) { |comp, part|
         ODDB::Dose.new(comp.qty + part.comparable_size.qty)
diff --git a/src/plugin/oddbdat_export.rb b/src/plugin/oddbdat_export.rb
index 8710f00..a942f79 100644
--- a/src/plugin/oddbdat_export.rb
+++ b/src/plugin/oddbdat_export.rb
@@ -47,7 +47,14 @@ class OddbDatExport < ODDB::Plugin
 			LimTxtTable, EanTable
 		]
 		ids = []
-		@app.each_package { |pac| ids.push(pac.odba_id) }
+        dose_missing_list = []
+		@app.each_package { |pac| 
+          ids.push(pac.odba_id) 
+          if pac.parts.empty?
+            dose_missing_list.push([pac.basename, pac.iksnr, pac.sequence.seqnr, pac.ikscd])
+          end
+        }
+
 		files += EXPORT_SERVER.export_oddbdat(ids, EXPORT_DIR, package_tables)
 
 		# codes table
@@ -65,9 +72,12 @@ class OddbDatExport < ODDB::Plugin
 
 		# readme
 		files += EXPORT_SERVER.export_oddbdat(nil, EXPORT_DIR, [Readme])
-		
+
 		# compress
 		EXPORT_SERVER.compress_many(EXPORT_DIR, 'oddbdat', files)
+
+        # warning
+        return dose_missing_list
 	end
 	def export_fachinfos
 		# fachinfo table
diff --git a/src/util/exporter.rb b/src/util/exporter.rb
index 23571e2..2bf6cfb 100644
--- a/src/util/exporter.rb
+++ b/src/util/exporter.rb
@@ -145,9 +145,10 @@ module ODDB
 			sleep(30)
 		end
 		def export_oddbdat
+          dose_missing_list = []
       safe_export 'oddbdat' do
         exporter = OdbaExporter::OddbDatExport.new(@app)
-        exporter.export
+        dose_missing_list = exporter.export
         EXPORT_SERVER.clear
         sleep(30)
         run_on_weekday(1) {
@@ -155,6 +156,22 @@ module ODDB
           EXPORT_SERVER.clear
           sleep(30)
         }
+
+        # here to raise warning if package.parts is empty
+        if !dose_missing_list.empty?
+			log = Log.new(@@today)
+			log.report = [
+				"Warning: Dose data (ODDB::Package.parts, Array of ODDB::Dose instances) is empty.",
+				"Message: export_oddbdat succeeded but the following package(s) do not have Dose data.",
+				"Package(s):",
+                dose_missing_list.collect do |list|
+                  list[0].to_s + ", " + \
+                  "http://#{SERVER_NAME}/de/gcc/resolve/pointer/%3A!registration%2C" + list[1].to_s + \
+                  "!sequence%2C" + list[2].to_s + "!package%2C" + list[3].to_s + ".\n"
+                end
+			].join("\n")
+			log.notify("Warning Export: oddbdat")
+        end
       end
 		end
 		def export_pdf