Hi,
I'm using VS2005 + Firebird 2.5RC1 + FirebirdClient(provider) 2.5.1 + DDEX 
2.04.While trying to add a DataSource, I'm getting the following error:"Failed 
to add relation(s)An item with the same key has already been added."
I can see the tables of my DB by expanding the FB connection at 
ServerExplorer.Maybe this could be related: listed in my table, there are a 
foreignkey(RDB$FOREIGN3) and also a constraint (INTEG_4) for the same 
field(CONTRATO_TIPO). At INTEG_4, the same field is repetead a lot times. I'll 
try to reproduce that blelow:Server ExplorerData 
ConnectionsMyConnectionTables|---CLIENTE      |--- CODIGO      |--- 
CONTRATO_TIPO      |--- RDB$FOREIGN3             |--- CONTRATO_TIPO      |--- 
INTEG_4             |--- CONTRATO_TIPO             :: (listed many times)       
      |--- CONTRATO_TIPO

To reproduce the fault, I used the following script:
CREATE DOMAIN CODIGO_SINT AS Smallint NOT NULL CHECK (VALUE>0);CREATE TABLE 
CONTRATO (  CODIGO CODIGO_SINT NOT NULL,  DESCRICAO VARCHAR(30) COLLATE PT_BR,  
PRIMARY KEY(CODIGO));CREATE TABLE CLIENTE (  CODIGO CODIGO_SINT,         
CONTRATO_TIPO CODIGO_SINT,PRIMARY KEY(CODIGO),FOREIGN KEY(CONTRATO_TIPO) 
REFERENCES CONTRATO(CODIGO)      ON DELETE NO ACTION      ON UPDATE CASCADE);


Do you think that could be a bug in the provider?
Best regards,Rogerio                                      
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