Message:
Alexanderhofstrasse is a street in Austria. When I looked through the provided list for camps located in Austria, Mauthausen and one of its subcamps were the only ones to pop up. This means it could be possible that Rozen was here and died due to being overworked, from disease, or from starvation. Mauthausen became severely crowded as it got multiple shipments from other camps, so that could explain how Rozen was lost.