@negativevolume yes I created just a blank file and then use the option INCLUDE to load geometry, stress and strain data. Actually it's possible that ...

Moreover, it seems to be that at step zero of the d3 plot the effective strain are actually non-zero, hence it could be just a visual bug of the solve...

@negativevolume  LS-PrePostR-V4.8.13-20Mar2021-64bit-r-Last_sett_2022_Modular-steel-1mm_test-22_11_steel_mass_2.k-26_01_2023-10_05_42.png

@negativevolume Thank you for the help, I will try to look into Primer; however in the input keyword the initial values for strain seem to appear, sti...