If you want to delete all the equations in a model how will you do that? Because there is no deleting option in the drop down menu.
What Vladimir is telling you is to click on manage equations which will bring up this new page,
Make sure you have Equations selected at the top (Circled in Red and marked number 1)
Then right click on the equation you want to delete ( Marked number 2) and it will give you the option to delete.
Just one extra click on Manage Equations... and go ahead!
What you say is not clear enough.
Retrieving data ...