>The object is defined in the following lines:
>
>> PUBLIC oUsuario
>> oUsuario = CREATEOBJECT("cusUsuario",curTempUsuario.iID)
>
>And yes, as I told, this application works perfetly in win9x, without change anything...

I think you should trace the app carefully. The only thing I can suppose (but it would be VERY strange), is that somehow the NT machine is running out of memory and it is unable to create the object. But I think you should get an error at least.

Also, there is any condition in your cusUsuario class' init for which it can return .F., thus not creating the object. Maybe somehow the iID field is getting a wrong value?

Just guessing. Tell me if you have any other suspicion.