OPIM - Random fastener error on manual partial selection

Recently I met an issue that when running OPIM in AutoPLANT with manual selection. If I manually select patial of the process line, even just a piece of pipe or a reducer, I got an error on fasterner, like weld, gasket, sometimes it says unconnected Components, sometimes says Scaler, symbol missing...it is kind of random.

I have set continuation component max to be 1.

Any idea?

Thanks,

Maggie