I need help with ABACUS MODELLING

Hello there, I need your help if you can please email me as i can not log into imechanica all the time to check my blogs because the website jams most of the time ,i will appreciate your help.

I need to draw a normal rectangle using abacus and then mesh it and apply force on it and to be as beam???

i tried to do it but i keep getting an error message saying 4 elements have missing property definitions???

If any one can help this is My email is nl1422@hotmail.com

Thank you so much.