In table view with FM12 I have no more the chance to order by a column
Try to create a new file and check if you can see the following.
If so, it means that your other file has some limitation on available menu, maybe it has not the full menu available in the privilege set you are using.
In the title of the column, click on the triangle on the right side and the sort menu will appear.
Exactly, you are completely right. It was a limitation on current user.
Retrieving data ...