There is a problem with commit command in older activities.

[mirnacarelli]

I runned the checkout command, I did an edition in yaml file and I tried to make updates, but the commit command didn't work:
mirna@mirna-Inspiron-3421:~/tst/virus_detectado$ tst commit
tst: invalid activity
activity has no files property

It also happened to others activities: converte_grau_radiano, converte_grau_radiano2, converte_temperatura, saldao_fim_de_estoque