Place mep fitting - null value

Hi i am searching for aswer “why my dyn doesn’t work”. I read some forum posts (Placing MEP fitting along pipe not working - #5 by Sigma) (Automated Pipe Valve/Fitting Placement Using MEPover) but still i don’t know how to fix it… My dyn:

My family:
S-IM-M3-PS-AS Czyszczak_Wavin-03.rfa (852 KB)

I get the error. Do you know how can i fix it? This is a problem with fitting family or i can fix it in dyn?