Thanks Mark for your answer:

It's correct your answer, but I refer to the next sample:

Local cMyVarTable
cMyVarTable = 'Tabla1'
GO 55555 IN (cMyVarTable)

In this case, if the reccount() of the table (cMyVarTable) is 1000, you get the error 5. But the question is: How Can I know what table provoke the Error?. The function alias() may be other diferent that (cMyVarTable)

I know that the aerror() function, makes a Array with data of the last Error. The element four, sometimes include the number of alias() that provoke the error. Sometimes, but not in this example.

Do you know a way?

Thanks again.

Fernando Molina