I am getting an error when analyzing a mat foundation. The error reads
Error : No Pile or soil support defined. Stopping analysis ... What am I doing wrong ?
The error is being caused by the fact that there are no supports defined for the mat. If your mat is supported on soil, you should go to Analysis properties > Soil Property and ensure that you have specified the value for Subgrade Modulus and also checked the box Use Soil Spring as shown next.
Alternately if your mat is supported on piles and you are using Pile Supports, you should go to Analysis properties > Pile Spring and ensure that the spring values for the piles ( Kx, Ky , Kz … ) are specified.
This should take care of the problem.