C# 数字刻度误差

我有一个C#中的程序，它连接到电子秤设备（digi scale）。我遇到的问题是，当我将值设置为电子秤的属性（单价和tareWieght）时，执行选项。 我得到的例外是

Error occured on SetTareWeight: Microsoft.PointOfService.PosControlException: Failed to set property TareWeight.
   at Microsoft.PointOfService.Legacy.LegacyProxy.SetProperty(String propertyName, Object propertyValue)
   at Microsoft.PointOfService.Legacy.LegacyScale.set_TareWeight(Decimal value)
   at Retalix.Client.SelfWeight.BusinessObjects.Devices.DigiScale.set_TareWeight(Int32 value) in c:\Project\CustomerScaleClient\Src\Retalix.Client.SelfWeight.BusinessObjects\Devices\DigiScale.cs:line 237
   at Retalix.Client.SelfWeight.BusinessObjects.Devices.Scale.ScaleLogic.SetScaleTareWeightByScaleManager(Int32 tareWeight) in c:\Project\CustomerScaleClient\Src\Retalix.Client.SelfWeight.BusinessObjects\Devices\Scale\ScaleLogic.cs:line 58
ErrorCode: Illegal
ErrorCodeExtended: 0
2013-01-17 12:31:46,789 [10] FATAL (Retalix.Client.SelfWeight.BusinessObjects.Devices.Scale.ScaleLogic) POS((null),(null)) InitialTrans(ID=(null), SEQ=(null)) 
Error occured on SetTareWeight: Microsoft.PointOfService.PosControlException: Failed to set property UnitPrice.
   at Microsoft.PointOfService.Legacy.LegacyProxy.SetProperty(String propertyName, Object propertyValue)
   at Microsoft.PointOfService.Legacy.LegacyScale.set_UnitPrice(Decimal value)
   at Retalix.Client.SelfWeight.BusinessObjects.Devices.DigiScale.set_UnitPrice(Decimal value) in c:\Project\CustomerScaleClient\Src\Retalix.Client.SelfWeight.BusinessObjects\Devices\DigiScale.cs:line 253
   at Retalix.Client.SelfWeight.BusinessObjects.Devices.Scale.ScaleLogic.SetScaleUnitPrice(Decimal unitPrice) in c:\Project\CustomerScaleClient\Src\Retalix.Client.SelfWeight.BusinessObjects\Devices\Scale\ScaleLogic.cs:line 76
ErrorCode: Illegal
ErrorCodeExtended: 0

我检查了适当的

DeviceEnable

并声明，当我为

UnitPrice

和

tareWeight

赋值时，它们的值为true

下一个代码是导致EXCTION的- *//比例尺是数字比例尺*

var scale = deviceProvider.GetDevice<IScale>(); 
scale.TareWeight = tareWeight; 

---

var scale=deviceProvider.GetDevice（）；
scale.TareWeight=TareWeight；

---

在分配到TareWight属性之前，我检查了deviceEnable是否为true-***

var scale=deviceProvider.GetDevice（）；scale.TareWeight=TareWeight；在assignment to TareWeight属性之前，我检查了deviceEnable是否为true。您可以在赋值行上设置断点，并查看scale对象的属性。你可能有类型问题。是否可以使用

IScale scale=deviceProvider.GetDevice（）？