How to remove unwanted links from SysML1.4::requirement

[MichPaule]

EA 16.1.1628 (64 bit)
Trying to trim the linking capabilities to the users needs...

The process demands <satisfy> links from SysML Block to SysML Requirement and <refine> links from UseCase to SysML Requirement (please don't ask why ).
I have successfully created the stereotyped relationships and linking is possible.
But I can't get rid of the standard QL links (Satisfies & Refines) no matter what I tried.
Both are always there when trying to link to a requirement.
I was expecting only the single link I configured using the stereotyped relationships.

According to https://sparxsystems.com/forums/smf/index.php/topic,44252.msg260847.html or https://sparxsystems.com/forums/smf/index.php/topic,48190.msg279985.html#msg279985 there seems to be a way.
But after hours of trying I'm still unable to figure out how follow the instructions given in Define Metamodel Constraints.
Would someone please help me out of my despair? 
TIA for your support!

Michael

[Eve]

You may be able to do it with a restricted perspective.

https://sparxsystems.com/enterprise_architect_user_guide/16.1/modeling_fundamentals/techno_sets.html (scroll down a bit)

You can also assign a perspective to a security group.

[MichPaule]

You may be able to do it with a restricted perspective.

https://sparxsystems.com/enterprise_architect_user_guide/16.1/modeling_fundamentals/techno_sets.html (scroll down a bit)

You can also assign a perspective to a security group.

Thanks Eve,

I just had a deeper look into this.
Unfortunately I didn't find a way to remove the <refine> linking option although in Restrictions / SysML 1.5 / Link Rules I deselected under Link Type: Refine the entry Block <-> Requirement.
Still the <refine> link is possible between a Block and a Requirement, even after closing/opening the model and selecting the created model-based perspective.
As my MDG was not involved at all (only plain SysML 1.5) I would expect the restriction should apply.
Did I find a bug here?

Michael

[MichPaule]

Success!
Got it working without restricted perspectives.
The key was to remove the unwanted <refine> relation by creating a Stereotyped Relationship with Stereotype=SysML1.4::refine from my Block (Source) to the <none> metaclass (Target).
The documentation somehow suggests the other way around - which doesn't do the trick.
This answer of Eve

Removing them requires creating a constraint for the existing relationship types targeting the metaclass '<none>'.

gave me the hint

Michael