Three layered reinforcement problem

Hello,

Could anyone suggest a solutions for the following problem. I am designing a slab where I need to use three layered reinforcement. I was successfully able to run the “Design ULS (Area elements)” and “Design SLS (Area elements)” tasks. I also checked the presence of reinforcement in Interactive Graphics. However, when I try to run the “Non-linear Analysis SLS (Area elements)” I get the following error:

Any suggestions are appreciated

With best regards,
Martin

Hello

I now understood that it means SLS checks for three layered reinforcement is not implemented in the program. The workaround was to model the reinforcement as multi layered

With best regards
Martin