I am only new to CAESAR II, so this my seem a little trivial to some.

I am having trouble generating a code stress check, and stress distributions. I have checked the 'allowable stresses' box when I selected the material in the piping input. The material is 106B, the code B31.3 and the allowables are automatically allocated. When I generate the stress report, it says the allowable stress is zero, hence it does not generate the correct stress plots or code compliance reports.

Many Thanks.