i tried to check a dummy leg using FEAtools in caesar2019.

i inserted loads, temperature, pressure, sizes...

i run and the calculus is overstressed.

So i inserted a reinforcing pad.

i run again and... the calculus stops because there are some probems with mesh. (i thing due to reinforcing pad)

the progams suggest to check mesh (i checked: it is ok) OR to flag the option "accept negative jacobian".

i don't find where is this flag to check.

anyone knows?