[Gretl-users] Trouble in deleting variables

Dear Gretl List Members, There's a problem that appears with a considerable frequency here at my work: To delete unused variables inside a Gretl session. Please take a look at the .gretl file attached. The variables "fora_de_uso", "fora_de_uso2", and "fora_de_uso3" (ID numbers: 9, 5, and 18, respectively) cannot be deleted even though they are not being used. Why does this happen? Best regards, Henrique P.S.: The last attached file was wrong!