" at System.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument) at System.Collections.Generic.Dictionary`2.FindEntry(TKey key) at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& value) at PX.Api.EnumerableEx.Ensure[TKey,TValue](IDictionary`2 dictionary, TKey key, Func`1 valueGetter) at PX.Objects.SO.SOShipmentEntry.CreateShipment(CreateShipmentArgs args) at PX.Objects.SO.SOShipmentEntry.AddSO(PXAdapter adapter) at PX.Data.PXAction`1.RunHandler(PXAdapter adapter) at PX.Data.PXAction`1.<Press>d__38.MoveNext() at PX.Data.PXAction`1.<Press>d__38.MoveNext() at PX.Data.PXAction`1.PressImpl(Boolean internalCall, Boolean externalCall) at PX.Data.PXAction`1.Press() at PX.Objects.DefaultEndpointImpl.ShipmentDetail_Insert(PXGraph graph, EntityImpl entity, EntityImpl targetEntity)"