物料分配报错

[{"operation":"BD_MATERIAL_List.MBIClick.tbSplitSubmit"}]
发生时间： 14:05:50
错误编号： 01acf000005b452f8376489a692bd0a6
错误信息： Value cannot be null.
Parameter name: source
===================================================
调用堆栈：

Server stack trace:
at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
at

Kingdee.K3.BD

.App.Common.ServicePlugIn.Material.MaterialUnitConvertSave.CanAddMaterialUnitConvert(DynamicObject entity, Decimal& weight, Int64& baseWeightUnitId, Int32& convertType)
at

Kingdee.K3.BD

.App.Common.ServicePlugIn.Material.MaterialUnitConvertSave.OnAddValidators(AddValidatorsEventArgs e)
at Kingdee.BOS.App.Core.PlugInProxy.OperationServicePlugInProxy.FireOnAddValidators(AddValidatorsEventArgs e)
at Kingdee.BOS.App.Core.AbstractOprerationService.TryValidate()
at Kingdee.BOS.App.Core.AbstractOprerationService.Validate()
at Kingdee.BOS.App.Core.AbstractOprerationService.DoExcete()
at Kingdee.BOS.App.Core.AbstractOprerationServi