Hi ,SupportI met a big problem about OpcLabs tools ,which is about OpcUa stuff.When I use methods (Writemultiple ,ReadMultiple,or SubscribeMultipleMonitoredItems),a same problem happens.Please check the files in the attachment,a windows error shows that it is a internal error of opclabs dlls.So I actually wonder why and how it happened, wish your feedback as soon as possible !