for your request,
I reply as below

1) What exact version and build of CAESAR II are you running?
- Ver.10.00(2018) build 170726

2) What piping code are you addressing?
- B31.3

3) The node that you're trying to define the weldolet on, is it on a straight piece of pipe?
- yes, I tried to define the weldolet on straight pipe

4) What is the material of the pipe at this location?
- it's not only one material...
: (552), B467 C70600, cu-ni(added as manual)
: (403), B619 N10276