If none of those are the reason, we will need to troubleshoot with your data. Can you post your files to our Secure File Upload site? Here is a link to the instructions: communities.bentley.com/.../7079.be-communities-secure-file-upload.aspx
These are the files we will need: cross section DGN,existing ground TIN, RDP, GPK, IRD, files in the rddbs folder. Also include details about what corridor/stations/components are not displaying correctly.