Setting material property for modified cam clay model

Question

I am facing following error while assigning the material property to the lambda. It will be really helpful if PLAXIS team can sort out for me.

Stefanos Papavasileiou · Answer

Dear Rituraj, 
 In your code, I see that you are defining a new material to which you assign a variable called mat5. Then two lines below you rename mat4 , which is not mat5 which you specified as a Modified Cam-Clay model. 
 Finally, you try to edit mat4's parameter lambda to a value and that fails. 
 Maybe mat4 is not a Modified Cam-Clay model, and you made a typo? 
 I always check the PLAXIS command line to understand what the error is. Maybe there you could spot the difference.