Equipment Connections in SI (mm) constant issues.

[popovUS9BY]

Hello colleagues,

I want to connect component (expansion joint) to pump using SI units - mm.

Connecting ports of the component:

Connecting ports of the pump:

For some reason this options does not work.

Since this problems does not appear working in inches, I try to replace port properties, just to connect the parts and start working, but here is not pressure class 16 in inches. So connections does not work again ...

I constantly see this:

Is there option to create custom connection according to fittings so not to see all those error messages?

I never ever have a positive result. I inserting equipment like valves (via SpecEditor), just connections to work any how, but there is BOM issues later ...

Also Plant3D replacing connecting ports without prompting with some already existing (but not working too).

Any advice welcome.