problem with server connection

i do this query: select c.cedula,t.nombre.t.id_tipo_documento from c left join tmp t on c.cedula=t.cedula;

 

and the server says

 

Server closed the connection unexpectedly

This probably means the server terminated abnormally

before or while processing the request

 

The connection to the server was lost. Attempting reset: Failed

 

what's happen????

 

i am working on the server, with Mandrake 9.1, PostgreSQL 7.3.2

:-) Sidar Lopez Cruz
- Cero Riesgo, S.A.