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when I try to connect to the database with tsqlconnetion, returns error: access violation
at address xxxx in module dbxcommondriver160.bpl, what might be happening?
how to solve this?

rad studio xe 2 with windows 7 64bits and firebird 2.0

thanks

Please, try to download the latest dbExpress driver for InterBase & Firebird build (4.3.5) and check if this problem still exists.