>Man, the changes that you've made in TableUpdate solve the problem!
>Why?
>I've tried many times setting all rows and force parameters without success...

A?

I just set all parameters I think TABLEUPDATE() needs esp. the ALIAS parameter.
Don't use VFP base CA class, build your own and have all basic logic in it.
Also have at least one method in it:
UpdateTable() thah have this:

LOCAL lbRetVal
lbRetVal = .t.
IF NOT TableUpdate(1, .t., this.Alias)
   AERROR(laError)
   MessageBox("Can not update "+this.Alias+", because:"+CHR(13)+;
              laError[1,2])
   lbRetVal = .f.
ENDIF
RETURN lbRetVal

and than instead of calling TABLEUPDATE call:

IF NOT CAInstance.UpdateTable()
   *** Logic if you can't update the table
ELSE
   *** Logic if you can update the table
ENDIF

Of course you can construct that method as you wish, to pass first two parameters that TABLEUPDATE() receives, but the last one ALWAYS should be [this.Alias].

Simplified method that we have in our class looked like this:

LPARAMETERS lbUpdateAll, lbOverwrite, lbNOTShowMessage
IF PCOUNT() < 1
   lbUpdateAll = 1
ENDIF

IF PCOUNT() < 3
   lbOverwrite = .t.
ENDIF
*** lbNOTShowMessage is used as default - .f.

LOCAL lbRetVal, lcError
lbRetVal = .t.
IF NOT TableUpdate(lbUpdateAll, lbOverwrite, this.Alias)
   AERROR(laError)
   lcError = "Can not update "+this.Alias+", because:" + CHR(13) + laError[1,2]
   IF NOT m.lbNOTShowMessage
      MessageBox(lcError)
   ELSE
      **** Log the error
   ENDIF
   lbRetVal = .f.
ENDIF
RETURN lbRetVal