Radiator and floor heating combination simulation issue

Hi there,

i would like to build up a model with BaseboardWaterC (radiator) and (RadiantVFlow) floor heating (only heating). I set up the Loops (also the domestic hotwater). I also added an internal source in the floor for radiant. To be honest I dont really understand where the simulation goes wrong since I am learning IronBug. Would you help me what exactly the problem is? I also checked in Openstudio but there the problem is not written (at least not the exact reason just an error in simulation). I also attached some screenshots of the IB part.
I thank you in advance if you have a look and help me out.
Thank you!

Radiator+Floorheating.gh (605.7 KB)

Hi @MingboPeng , maybe do you have any idea?