Putting project 'orm-ec-flex' on hold due to unhandled exception:

System.PlatformNotSupportedException: Named maps are not supported.
at System.IO.MemoryMappedFiles.MemoryMappedFile.CreateCore(FileStream fileStream, String mapName, HandleInheritability inheritability, MemoryMappedFileAccess access, MemoryMappedFileOptions options, Int64 capacity)
at System.IO.MemoryMappedFiles.MemoryMappedFile.CreateOrOpen(String mapName, Int64 capacity, MemoryMappedFileAccess access, MemoryMappedFileOptions options, HandleInheritability inheritability)
at System.IO.MemoryMappedFiles.MemoryMappedFile.CreateOrOpen(String mapName, Int64 capacity)
at SIL.LCModel.Infrastructure.Impl.SharedXMLBackendProvider.CreateOrOpen(String name, Int64 capacity, Boolean createdNew)
at SIL.LCModel.Infrastructure.Impl.SharedXMLBackendProvider.CreateSharedMemory(Boolean createdNew)
at SIL.LCModel.Infrastructure.Impl.SharedXMLBackendProvider.StartupInternal(Int32 currentModelVersion)
at SIL.LCModel.Infrastructure.Impl.BackendProvider.StartupInternalWithDataMigrationIfNeeded(IThreadedProgress progressDlg)
at SIL.LCModel.Infrastructure.Impl.BackendProvider.StartupExtantLanguageProject(IProjectIdentifier projectId, Boolean fBootstrapSystem, IThreadedProgress progressDlg)
at SIL.LCModel.LcmCache.<>c__DisplayClass12_0.b__0(IDataSetup dataSetup)
at SIL.LCModel.LcmCache.CreateCacheInternal(IProjectIdentifier projectId, String userWsIcuLocale, ILcmUI ui, ILcmDirectories dirs, LcmSettings settings, Action1 doThe, Action1 initialize)
at SIL.LCModel.LcmCache.CreateCacheFromExistingData(IProjectIdentifier projectId, String userWsIcuLocale, ILcmUI ui, ILcmDirectories dirs, LcmSettings settings, IThreadedProgress progressDlg)
at LfMerge.Core.FieldWorks.FwProject.TryGetLcmCache() in /home/builder/repo/src/LfMerge.Core/FieldWorks/FwProject.cs:line 97
at LfMerge.Core.FieldWorks.FwProject..ctor(LfMergeSettings settings, String database) in /home/builder/repo/src/LfMerge.Core/FieldWorks/FwProject.cs:line 31
at LfMerge.Core.LanguageForgeProject.get_FieldWorksProject() in /home/builder/repo/src/LfMerge.Core/LanguageForgeProject.cs:line 93
at LfMerge.Core.Actions.TransferLcmToMongoAction.DoRun(ILfProject project) in /home/builder/repo/src/LfMerge.Core/Actions/TransferLcmToMongoAction.cs:line 44
at LfMerge.Core.Actions.Action.Run(ILfProject project) in /home/builder/repo/src/LfMerge.Core