In general it should be possible to cover your use case with GMF, so the
problem is probably covered behind some particular specific of your domain
model/used .gmfmap. First I suggest you to edit .gmfmap directly in emf-generated
editor (do not use dashboard). Try to remove all the existing links and create
manually first link mapping. Will it be working or not?
Then you can try adding more links each with own toolbar tools.
If you want to âcombineâ all the links into the single toolbar tool then
you can try it as a last step.
In general if something wrong goes with the link creation then I suppose
the reason (taking into account the fact that link creation was enabled)
is in generated ???ViewProvider. getEdgeViewClass() method â looks like this
method will return null instead of the proper Link ViewFactory class.