Dear,nThank you for your quick response!nI have already read the couple field analysis Guide and also all the examples related to Electrostatic-Structural Analysis but I still could not figure it out. I have attached the command I used for my simulation for you valuable feedback. because whenever I run the simulation I got this error:n*** ERROR ***              CP =   49.594  TIME= 23:46:26n Specified constraint not allowed on slave degree of freedom in coupled  n set.                                   n Coupled set number 10 First node= 58802 Slave node = 66002 Degree of  n freedom = VOLT.                             n Move Move constraint to first node or remove coupling and constrain  nnThank you in advancen