>>I've broken into this problem
>>
>>I installed an application with a database. Now happens that as the user runs a form He gets the error 5, but if I launch the application from my pc I have no error.
>>What can it be ?
>
>Can you find the exact line of code which is failing?

yes is a select, but it never gave me problems...

Select la_anamag.id, la_anamag.cod1, la_anamag.descri,udm, la_anamag.ctm1+la_anamag.ctm2+la_anamag.catmer as 'catego', la_tabudm.sigla as 'udmsigla', la_tabcat.descri as 'catdes', ragsoc, lastcosto  from 'la_anamag'  left join 'la_tabudm' on la_anamag.udm = la_tabudm.idudm  left join 'la_tabcat'  on la_anamag.ctm1+la_anamag.ctm2+la_anamag.catmer =  la_tabcat.idfam + la_tabcat.idgrp + la_tabcat.idcat left join 'la_fornit' on la_anamag.cdlstforn = la_fornit.id  into cursor 'wla_listino' READWRITE 

it is a very old application. The only thing I did was to change the database name, but it is strange that I got no errors if I run it from My Pc .
I thought I got over the problem copying an empty set of data but as soon as I insert a new record, it starte to give me the error again.
The record was correctly written.