External Content Typ: "Connection manager did not return valid connection."

Hi,
I created an external content typ in the sharepoint designer which takes my custom WCF Service as a data source. I sucessfully added all my required operations and created a new list based on the new content typ. At first I had a security issue which I got
resolved by editing my BDC configuration in the Central Administration. Now I face a new issue. When I open my external list the BDC Service gives me the following error message:
"Connection manager did not return valid connection."
Has someone a solution for this kind of message?
Thanks,
Eric

Hi,
   I got the same error "Connection manager did not return valid connection.". In the error log it shows
09/17/2010 12:21:35.28  w3wp.exe (0x13FC)                        0x0F60 Business Connectivity Services Business Data                
 a5t8 Medium   Chose 'PassThrough' auth mode cb34d6ff-663a-4872-9022-21782a7be122
09/17/2010 12:21:35.28  w3wp.exe (0x13FC)                        0x0F60 Business Connectivity Services Business Data                
 a5uo Medium   Initialized WcfSystemUtility for LobSystemInstance with Id '144'. cb34d6ff-663a-4872-9022-21782a7be122
09/17/2010 12:21:35.28  w3wp.exe (0x13FC)                        0x0F60 Business Connectivity Services Business Data                
 a5up Medium   Wcf Service AuthN Mode: PassThrough  cb34d6ff-663a-4872-9022-21782a7be122
09/17/2010 12:21:35.28  w3wp.exe (0x13FC)                        0x0F60 Business Connectivity Services Business Data                
 f8dk Medium   Checking for current connection to SystemInstance: NewCustomer cb34d6ff-663a-4872-9022-21782a7be122
09/17/2010 12:21:35.28  w3wp.exe (0x13FC)                        0x0F60 Business Connectivity Services Business Data                
 a5s9 Medium   Creating ClientBase object with type : BCSServiceProxy.WCFCustomerClient cb34d6ff-663a-4872-9022-21782a7be122
09/17/2010 12:21:35.29  w3wp.exe (0x13FC)                        0x0F60 Business Connectivity Services Business Data                
 a5tz Unexpected System.MissingMethodException: Method not found: 'Void Microsoft.BusinessData.SystemSpecific.Wcf.IBdcClientBase.set_ActAs(Boolean)'.     at Microsoft.SharePoint.BusinessData.SystemSpecific.Wcf.WcfConnectionManager.ConfigureCredentials(Type
clientBaseType, Object clientBase)     at Microsoft.SharePoint.BusinessData.SystemSpecific.Wcf.WcfConnectionManager.CreateClientBase()     at Microsoft.SharePoint.BusinessData.SystemSpecific.Wcf.WcfConnectionManager.GetConnection()    
at Microsoft.SharePoint.BusinessData.SystemSpecific.Wcf.WcfSystemUtility.ExecuteStatic(IMethodInstance methodInstance, ILobSystemInstance lobSystemInstance, Object[] args, IExecutionContext context) cb34d6ff-663a-4872-9022-21782a7be122
Can you help me on this?
Thanks in advance
Thybu

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    TechNet Community Support

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