I (finally !!) sucessfully compiled an UMAT for LS-Dyna and copied the executable inside the folder where the input file is present but LS-Dyna displays the following warning message
"Warning Default mat41 is used Please check user material library"
However the simulation proceeds somehow. I tried adding some write(*,*) statements to debug but those messages are not displayed.
I even tried running the simulation without the executable then again the same error message is displayed. Whats happening and am totally lost !