Index: ssts-invoice/src/main/java/com/forgon/disinfectsystem/invoicemanager/service/InvoiceManagerImpl.java
===================================================================
diff -u -r35385 -r35386
--- ssts-invoice/src/main/java/com/forgon/disinfectsystem/invoicemanager/service/InvoiceManagerImpl.java	(.../InvoiceManagerImpl.java)	(revision 35385)
+++ ssts-invoice/src/main/java/com/forgon/disinfectsystem/invoicemanager/service/InvoiceManagerImpl.java	(.../InvoiceManagerImpl.java)	(revision 35386)
@@ -3395,7 +3395,11 @@
 		for(Entry<Long,Integer> entry : dgIdToTotalAmountMap.entrySet()){
 			Long dgId = entry.getKey();
 			Integer sendAmount = entry.getValue();
-			Long stockAmount = dgIdToDisposableGoodsStockMap.get(entry.getKey()).getAmount();
+			Long stockAmount = 0L;
+			DisposableGoodsStock stock = dgIdToDisposableGoodsStockMap.get(dgId);
+			if(stock != null){
+				stockAmount = stock.getAmount();
+			}
 			if(stockAmount == null){
 				stockAmount = 0L;
 			}