Hi the João Your problem is the following in the pass we had your foxpro environment with set exact off, now your environment is set exact on

if you do the following test in the command window

set exact off
?inlist("SUM", "S","C","D")
the rwsult is .t.

now do the following

set exact on
?inlist("SUM", "S","C","D")
the rwsult is .f.