Index: ssts-basedata/src/main/java/com/forgon/disinfectsystem/entity/invoicemanager/Invoice.java
===================================================================
diff -u -r30612 -r30613
--- ssts-basedata/src/main/java/com/forgon/disinfectsystem/entity/invoicemanager/Invoice.java	(.../Invoice.java)	(revision 30612)
+++ ssts-basedata/src/main/java/com/forgon/disinfectsystem/entity/invoicemanager/Invoice.java	(.../Invoice.java)	(revision 30613)
@@ -617,24 +617,29 @@
 	 */
 	@Transient
 	public void updatePrintStatus(ObjectDao dao){
+		
+		int totalAmount = getInvoiceItem().size();
+		
 		int printedCount = 0;
 		for(InvoiceItem item : getInvoiceItem()){
 			if(item.printed()){
 				++printedCount;
 			}
 		}
 		
-		// 退货数量
-		int returnAmount = 0;
-		String sql = String.format("select count(*) from %s po where (po.invoice_id=%s or invoice2_id=%s) and po.status in('%s','%s')", 
-				TousseInstance.class.getSimpleName(), this.id, this.id, TousseInstance.STATUS_STERILED, TousseInstance.STATUS_DISCARD);
-		returnAmount = dao.countBySql(sql);
+		if(printedCount < totalAmount){
+			// 退货数量
+			int returnAmount = 0;
+			String sql = String.format("select count(*) from %s po where (po.invoice_id=%s or invoice2_id=%s) and po.status in('%s','%s')", 
+					TousseInstance.class.getSimpleName(), this.id, this.id, TousseInstance.STATUS_STERILED, TousseInstance.STATUS_DISCARD);
+			returnAmount = dao.countBySql(sql);
+			
+			printedCount += returnAmount;
+		}
 		
-		printedCount += returnAmount;
-		
 		if(printedCount == 0){
 			setIsPrint(PRINT_NO);
-		}else if(printedCount == getInvoiceItem().size()){
+		}else if(printedCount == totalAmount){
 			setIsPrint(PRINT_YES);
 			setPrintTime(new Date());
 		}else{