diff --git a/Source/ProjectRimFactory/Industry/UI/ITab_PaperclipDuplicator.cs b/Source/ProjectRimFactory/Industry/UI/ITab_PaperclipDuplicator.cs
index 5a74e54..8b4eb98 100644
--- a/Source/ProjectRimFactory/Industry/UI/ITab_PaperclipDuplicator.cs
+++ b/Source/ProjectRimFactory/Industry/UI/ITab_PaperclipDuplicator.cs
@@ -66,64 +66,71 @@ private void HandleDepositWithdrawRequest()
                 {
                     if (int.TryParse(amountTextArea, out int result))
                     {
-                        if (deposit)
+                        if(result > -1)
                         {
-                            List<ThingCount> selected = new List<ThingCount>();
-                            int current = 0;
-                            foreach (Thing item in SelBuilding.boundStorageUnit.StoredItems.ToList())
+                            if (deposit)
                             {
-                                if (item.def == PRFDefOf.Paperclip)
+                                List<ThingCount> selected = new List<ThingCount>();
+                                int current = 0;
+                                foreach (Thing item in SelBuilding.boundStorageUnit.StoredItems.ToList())
                                 {
-                                    int num = Math.Min(result - current, item.stackCount);
-                                    selected.Add(new ThingCount(item, num));
-                                    current += num;
+                                    if (item.def == PRFDefOf.Paperclip)
+                                    {
+                                        int num = Math.Min(result - current, item.stackCount);
+                                        selected.Add(new ThingCount(item, num));
+                                        current += num;
+                                    }
+                                    if (current == result)
+                                    {
+                                        break;
+                                    }
                                 }
                                 if (current == result)
                                 {
-                                    break;
+                                    SelBuilding.DepositPaperclips(result);
+                                    for (int i = 0; i < selected.Count; i++)
+                                    {
+                                        selected[i].Thing.SplitOff(selected[i].Count);
+                                    }
+                                    Messages.Message("SuccessfullyDepositedPaperclips".Translate(result), MessageTypeDefOf.PositiveEvent);
                                 }
-                            }
-                            if (current == result)
-                            {
-                                SelBuilding.DepositPaperclips(result);
-                                for (int i = 0; i < selected.Count; i++)
+                                else
                                 {
-                                    selected[i].Thing.SplitOff(selected[i].Count);
+                                    Messages.Message("PRFNotEnoughPaperclips".Translate(), MessageTypeDefOf.RejectInput);
                                 }
-                                Messages.Message("SuccessfullyDepositedPaperclips".Translate(result), MessageTypeDefOf.PositiveEvent);
                             }
                             else
                             {
-                                Messages.Message("PRFNotEnoughPaperclips".Translate(), MessageTypeDefOf.RejectInput);
-                            }
-                        }
-                        else
-                        {
-                            if (result < SelBuilding.PaperclipsActual)
-                            {
-                                List<Thing> output = new List<Thing>();
-                                int current = 0;
-                                while (current < result)
+                                if (result < SelBuilding.PaperclipsActual)
                                 {
-                                    int num = Math.Min(result - current, PRFDefOf.Paperclip.stackLimit);
-                                    Thing paperclip = ThingMaker.MakeThing(PRFDefOf.Paperclip);
-                                    paperclip.stackCount = num;
-                                    output.Add(paperclip);
-                                    current += num;
+                                    List<Thing> output = new List<Thing>();
+                                    int current = 0;
+                                    while (current < result)
+                                    {
+                                        int num = Math.Min(result - current, PRFDefOf.Paperclip.stackLimit);
+                                        Thing paperclip = ThingMaker.MakeThing(PRFDefOf.Paperclip);
+                                        paperclip.stackCount = num;
+                                        output.Add(paperclip);
+                                        current += num;
+                                    }
+                                    for (int i = 0; i < output.Count; i++)
+                                    {
+                                        GenPlace.TryPlaceThing(output[i], SelBuilding.Position, SelBuilding.Map, ThingPlaceMode.Direct);
+                                        SelBuilding.boundStorageUnit.Notify_ReceivedThing(output[i]);
+                                    }
+                                    SelBuilding.WithdrawPaperclips(result);
+                                    Messages.Message("SuccessfullyWithdrawnPaperclips".Translate(result), MessageTypeDefOf.PositiveEvent);
                                 }
-                                for (int i = 0; i < output.Count; i++)
+                                else
                                 {
-                                    GenPlace.TryPlaceThing(output[i], SelBuilding.Position, SelBuilding.Map, ThingPlaceMode.Direct);
-                                    SelBuilding.boundStorageUnit.Notify_ReceivedThing(output[i]);
+                                    Messages.Message("PRFNotEnoughPaperclips".Translate(), MessageTypeDefOf.RejectInput);
                                 }
-                                SelBuilding.WithdrawPaperclips(result);
-                                Messages.Message("SuccessfullyWithdrawnPaperclips".Translate(result), MessageTypeDefOf.PositiveEvent);
-                            }
-                            else
-                            {
-                                Messages.Message("PRFNotEnoughPaperclips".Translate(), MessageTypeDefOf.RejectInput);
                             }
                         }
+                        else
+                        {
+                            Messages.Message("PRFInputInvalid".Translate(), MessageTypeDefOf.RejectInput);
+                        }
                     }
                     else
                     {