Repository reference location seems to be no longer available: ``` <repository-reference location="https://download.itemis.com/updates/releases/2.1.1/" enabled="true" /> ``` This is the old ANTLR distribution (from the target): ``` <unit id="de.itemis.xtext.antlr.feature.feature.group" version="2.1.1.v201405091103"/> <repository location="https://download.itemis.com/updates/releases/2.1.1/"/> ``` It is not reachable at the moment.. will need to wait for upstream fix.. In case the missing parts can be mirrored in the TDL Extras..