The application might crash during initialization if the Device Detection database is corrupted. The cause of the crash is an unhandled exception that is written to the Windows Event Log:
Description: The process was terminated due to an unhandled exception.
Exception Info: System.AccessViolationException
at FiftyOne.DeviceDetection.Hash.Engine.OnPremise.Interop.DeviceDetectionHashEngineModulePINVOKE.EngineHashSwig_process__SWIG_0(System.Runtime.InteropServices.HandleRef, System.Runtime.InteropServices.HandleRef)
at FiftyOne.DeviceDetection.Hash.Engine.OnPremise.Interop.EngineHashSwig.process(FiftyOne.DeviceDetection.Hash.Engine.OnPremise.Interop.EvidenceDeviceDetectionSwig)
at FiftyOne.DeviceDetection.Hash.Engine.OnPremise.FlowElements.DeviceDetectionHashEngine.ProcessEngine(FiftyOne.Pipeline.Core.Data.IFlowData, FiftyOne.DeviceDetection.Hash.Engine.OnPremise.Data.IDeviceDataHash)
at FiftyOne.Pipeline.Engines.FlowElements.AspectEngineBase`2[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].ProcessWithCache(FiftyOne.Pipeline.Core.Data.IFlowData)
at FiftyOne.Pipeline.Core.FlowElements.FlowElementBase`2[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Process(FiftyOne.Pipeline.Core.Data.IFlowData)
at FiftyOne.Pipeline.Core.FlowElements.Pipeline.Process(FiftyOne.Pipeline.Core.Data.IFlowData)
at Sitecore.CES.DeviceDetection.Providers.FiftyOneDegrees.ProviderWrapperV4.ProcessFlowData(Sitecore.CES.DeviceDetection.Data.UserAgentClientHintsData)
To resolve the issue, consider the following options:
Alternatively, delete all the files under the /App_Data/DeviceDetection folder and restart the affected instances.