Dear Support-Team,

we get an inexplicable Domain construction error. Everything is working fine, then something happens - we think the database server shuts down unexpectedly. And we get following error:

DataObjects.NET.Exceptions.DomainConstructionException: Domain construction error. Inner exception: DataObjects.NET.Exceptions.DatabaseModelExtractorException: Unknown error during extraction of Domain Database Model. Inner exception: System.InvalidCastException: Die angegebene Umwandlung ist ungültig. ---> DataObjects.NET.Exceptions.DatabaseModelExtractorException: Unknown error during extraction of Domain Database Model. Inner exception: System.InvalidCastException: Die angegebene Umwandlung ist ungültig. ---> System.InvalidCastException: Die angegebene Umwandlung ist ungültig.
bei DataObjects.NET.Database.Drivers.MSSQL.MSSQLExtractor.BuildColumnLookupCache()
bei DataObjects.NET.Database.Drivers.MSSQL.MSSQLExtractor.GetAllColumns(String table)
bei DataObjects.NET.DatabaseModel.Extractors.DatabaseModelExtractor.ExtractModel(DomainUpdateMode updateMode)
--- Ende der internen Ausnahmestapelüberwachung ---
bei DataObjects.NET.DatabaseModel.Extractors.DatabaseModelExtractor.ExtractModel(DomainUpdateMode updateMode)
bei DataObjects.NET.Domain.ExtractDatabase(DomainBuildContext context, DomainUpdateMode updateMode)
bei DataObjects.NET.Domain.Build(DomainUpdateMode updateMode)

We have been using DO 3.8.8 with SQL-Server 2008 R2 in compatibility mode and updated to DO 3.8.9 but it doesn't help. Any suggestions?

Sincerely

Juri