Thank you very much! I moved all the data files involved to another directory and now it has worked. Seems like the tools didn´t like them.
Now I have a Network Dataset, but the analysis keep producing strange results.
1) When creating service areas, each individual Polygon is shaped the same. This occurs for my own network aswel as for the network created from the provided Cincinnati data...
2) A lot of my points of interest wont be located onto the ND when processing service area calulations. I found its allways the ones, who are located closest to transit lines. But i have excluded them in my analysis settings, just as Melinda has shown in her tutorial on YouTube
Is there anythin I might have forgotten about? Thanks in advance