akapfham
akapfham
Thanks for your suggestions. I've done a quick test regarding ".dockspan-tab-host" and i am afraid this is not the solution (please see attached screen shot). 
Thanks again for the quick response! But i am afraid this doesn't work either. The suggested solution leads to a behaviour that the first tab which is docked "fill" is...
I just updated to 2.511.0 and the exception is still there! You get the same exception with the IDE-Demo (https://node-projects.github.io/dock-spawn-ts/page/demo/ide/demo.html). Though i do not know if the Demo is already...