Error message from the first time the caravan arrived at their destination to offer gifts

System.NullReferenceException: Object reference not set to an instance of an object
at DynamicTradeInterface.UserInterface.Columns.ColumnButtons.PostOpen (System.Collections.Generic.IEnumerable`1[T] rows, RimWorld.Transactor transactor) [0x000e5] in <32697bdcdd7d4d148c8f8e6ee9eea684>:0
at DynamicTradeInterface.UserInterface.Window_DynamicTrade.PopulateTable (DynamicTradeInterface.InterfaceComponents.TableBox.Table`1[T] table, RimWorld.Transactor transactor) [0x00287] in <32697bdcdd7d4d148c8f8e6ee9eea684>:0
at DynamicTradeInterface.UserInterface.Window_DynamicTrade.RefreshData () [0x00008] in <32697bdcdd7d4d148c8f8e6ee9eea684>:0
at DynamicTradeInterface.UserInterface.Window_DynamicTrade.PreOpen () [0x00039] in <32697bdcdd7d4d148c8f8e6ee9eea684>:0
at Verse.WindowStack.Add (Verse.Window window) [0x0001f] in <cd7169108ea74757aa50c5b33d275c15>:0
at DynamicTradeInterface.Patches.Dialog_TradePatches.Prefix (RimWorld.Dialog_Trade __instance, System.Boolean ___giftsOnly) [0x0002c] in <32697bdcdd7d4d148c8f8e6ee9eea684>:0
at (wrapper dynamic-method) RimWorld.Dialog_Trade.RimWorld.Dialog_Trade.PostOpen_Patch1(RimWorld.Dialog_Trade)
at Verse.WindowStack.Add (Verse.Window window) [0x0003a] in <cd7169108ea74757aa50c5b33d275c15>:0
at RimWorld.Planet.CaravanArrivalAction_OfferGifts.Arrived (RimWorld.Planet.Caravan caravan) [0x00027] in <cd7169108ea74757aa50c5b33d275c15>:0
at RimWorld.Planet.Caravan_PathFollower.PatherArrived () [0x0002e] in <cd7169108ea74757aa50c5b33d275c15>:0
at RimWorld.Planet.Caravan_PathFollower.TryEnterNextPathTile () [0x00039] in <cd7169108ea74757aa50c5b33d275c15>:0
at RimWorld.Planet.Caravan_PathFollower.PatherTick () [0x000f0] in <cd7169108ea74757aa50c5b33d275c15>:0
at RimWorld.Planet.Caravan.Tick () [0x0000c] in <cd7169108ea74757aa50c5b33d275c15>:0
at RimWorld.Planet.WorldObjectsHolder.WorldObjectsHolderTick () [0x00029] in <cd7169108ea74757aa50c5b33d275c15>:0
at RimWorld.Planet.World.WorldTick () [0x00016] in <cd7169108ea74757aa50c5b33d275c15>:0
at (wrapper dynamic-method) Verse.TickManager.Verse.TickManager.DoSingleTick_Patch3(Verse.TickManager)
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) Verse.Log:Verse.Log.Error_Patch2 (string)
(wrapper dynamic-method) Verse.TickManager:Verse.TickManager.DoSingleTick_Patch3 (Verse.TickManager)
Verse.TickManager:TickManagerUpdate ()
(wrapper dynamic-method) Verse.Game:Verse.Game.UpdatePlay_Patch2 (Verse.Game)
Verse.Root_Play:Update ()

Error message on subsequent attempts

Exception filling window for Verse.FloatMenuWorld: System.NullReferenceException: Object reference not set to an instance of an object
at DynamicTradeInterface.UserInterface.Columns.ColumnButtons.PostOpen (System.Collections.Generic.IEnumerable`1[T] rows, RimWorld.Transactor transactor) [0x000e5] in <32697bdcdd7d4d148c8f8e6ee9eea684>:0
at DynamicTradeInterface.UserInterface.Window_DynamicTrade.PopulateTable (DynamicTradeInterface.InterfaceComponents.TableBox.Table`1[T] table, RimWorld.Transactor transactor) [0x00287] in <32697bdcdd7d4d148c8f8e6ee9eea684>:0
at DynamicTradeInterface.UserInterface.Window_DynamicTrade.RefreshData () [0x00008] in <32697bdcdd7d4d148c8f8e6ee9eea684>:0
at DynamicTradeInterface.UserInterface.Window_DynamicTrade.PreOpen () [0x00039] in <32697bdcdd7d4d148c8f8e6ee9eea684>:0
at Verse.WindowStack.Add (Verse.Window window) [0x0001f] in <cd7169108ea74757aa50c5b33d275c15>:0
at DynamicTradeInterface.Patches.Dialog_TradePatches.Prefix (RimWorld.Dialog_Trade __instance, System.Boolean ___giftsOnly) [0x0002c] in <32697bdcdd7d4d148c8f8e6ee9eea684>:0
at (wrapper dynamic-method) RimWorld.Dialog_Trade.RimWorld.Dialog_Trade.PostOpen_Patch1(RimWorld.Dialog_Trade)
at Verse.WindowStack.Add (Verse.Window window) [0x0003a] in <cd7169108ea74757aa50c5b33d275c15>:0
at RimWorld.Planet.CaravanArrivalAction_OfferGifts.Arrived (RimWorld.Planet.Caravan caravan) [0x00027] in <cd7169108ea74757aa50c5b33d275c15>:0
at RimWorld.Planet.Caravan_PathFollower.PatherArrived () [0x0002e] in <cd7169108ea74757aa50c5b33d275c15>:0
at RimWorld.Planet.Caravan_PathFollower.StartPath (System.Int32 destTile, RimWorld.Planet.CaravanArrivalAction arrivalAction, System.Boolean repathImmediately, System.Boolean resetPauseStatus) [0x000da] in <cd7169108ea74757aa50c5b33d275c15>:0
at RimWorld.Planet.CaravanArrivalActionUtility+<>c__DisplayClass0_0`1[T].<GetFloatMenuOptions>b__0 () [0x00031] in <cd7169108ea74757aa50c5b33d275c15>:0
at Verse.FloatMenuOption.Chosen (System.Boolean colonistOrdering, Verse.FloatMenu floatMenu) [0x00030] in <cd7169108ea74757aa50c5b33d275c15>:0
at (wrapper dynamic-method) Verse.FloatMenuOption.Verse.FloatMenuOption.DoGUI_Patch1(Verse.FloatMenuOption,UnityEngine.Rect,bool,Verse.FloatMenu)
at Verse.FloatMenu.DoWindowContents (UnityEngine.Rect rect) [0x000fb] in <cd7169108ea74757aa50c5b33d275c15>:0
at Verse.FloatMenuWorld.DoWindowContents (UnityEngine.Rect inRect) [0x0009b] in <cd7169108ea74757aa50c5b33d275c15>:0
at Verse.Window.InnerWindowOnGUI (System.Int32 x) [0x001d3] in <cd7169108ea74757aa50c5b33d275c15>:0
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) Verse.Log:Verse.Log.Error_Patch2 (string)
Verse.Window:InnerWindowOnGUI (int)
UnityEngine.GUI:CallWindowDelegate (UnityEngine.GUI/WindowFunction,int,int,UnityEngine.GUISkin,int,single,single,UnityEngine.GUIStyle)

Thank you, this is not something i've seen or heard of before, i'll look into it.
Is it 1.4 or 1.5?

Remember you can hold down control to open vanilla window!

this was on 1.4

Originally posted by Zeracronius:

Remember you can hold down control to open vanilla window!

right, i forgot about that

So far i haven't been able to reproduce this error.
I have no issues with giving gifts to hostile colonies, and permanently hostile don't even give the option.

Ok, looks like it's if you try to gift with no silver.

I have pushed an update that should fix it

Originally posted by Zeracronius:

Ok, looks like it's if you try to gift with no silver.

oh yeah i guess my caravan didn't have silver, just lots of items