Hi,

we are recently getting an error when using

* firebird (embedded) 2.5.3

* firebird client 4.5.2

* Windows 7 x64

* Nhibernate (.Net)

Here is the stacktrace: 

FirebirdSql.Data.FirebirdClient.FbException: operating system directive CreateFile failed ---> FirebirdSql.Data.Common.IscException: operating system directive CreateFile failed 
bei FirebirdSql.Data.Client.Native.FesDatabase.ParseStatusVector(IntPtr[] statusVector) in c:\Users\Jiri\Documents\devel\NETProvider\working\NETProvider\src\FirebirdSql.Data.FirebirdClient\Client\Native\FesDatabase.cs:Zeile 420. 
bei FirebirdSql.Data.Client.Native.FesDatabase.Attach(DatabaseParameterBuffer dpb, String dataSource, Int32 port, String database) in c:\Users\Jiri\Documents\devel\NETProvider\working\NETProvider\src\FirebirdSql.Data.FirebirdClient\Client\Native\FesDatabase.cs:Zeile 291. 
bei FirebirdSql.Data.FirebirdClient.FbConnectionInternal.Connect() in c:\Users\Jiri\Documents\devel\NETProvider\working\NETProvider\src\FirebirdSql.Data.FirebirdClient\FirebirdClient\FbConnectionInternal.cs:Zeile 191. 
— Ende der internen Ausnahmestapelüberwachung — 
bei FirebirdSql.Data.FirebirdClient.FbConnectionInternal.Connect() in c:\Users\Jiri\Documents\devel\NETProvider\working\NETProvider\src\FirebirdSql.Data.FirebirdClient\FirebirdClient\FbConnectionInternal.cs:Zeile 196. 
bei FirebirdSql.Data.FirebirdClient.FbConnection.Open() in c:\Users\Jiri\Documents\devel\NETProvider\working\NETProvider\src\FirebirdSql.Data.FirebirdClient\FirebirdClient\FbConnection.cs:Zeile 539. 
bei NHibernate.Connection.DriverConnectionProvider.GetConnection() 

Do you have any ideas why this happens?

The file is available and accessed a few seconds before.

The problem just accrues recently without any changes in the source. Can this be caused by a Windows Update?