Dear Magnus many thanks for your help, I didnt know that exist this built in function. I replace the UDF function with this and work fine, but I still I surprise why the propert work of the UDF function depends on the client that we use to connect to the database

Best Regards
Diego Gandino
Ing. en Sistemas de Información
FGKP Software - www.fgkpsoft.com.ar
Cel: 03564-15410820
msn: gandinodiego@...

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