Thank you. I deleted and recreated the structural block but the error persists. Now I also tried renaming the folder v221 to v221.old but the same error is occurring. However, after renaming this folder, when I dont transfer the EM forces to structural, the simulation is running fine. Maxwell and mechanical are updating separately with just same geometry being transferred but I still don't have the .mechdb file. There is a .dat file and .rst file . Do you have any input on this?