On 3-1-2014 14:09, Thomas Steinmaurer wrote:

>> Good Day
>>
>> Someone already passed the issue below:
>>
>> 'SelectQuery: Unsuccessful execution caused by a system error that precludes
>> successful execution of subsequent statements.
>> Error reading data from the connection.'
>>
>> I'm using Firebird 2.5 and Delphi 7
>>
>> Some hint of what might be?
>
> Usually, either the server restarted or the Firebird server crashed.
> Anything suspicious in firebird.log on the server?

Or the connection was closed unexpectedly for a different reason.

Mark
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Mark Rotteveel