I tried exporting a corridor template this morning and received the error message below. The full error message is attached.
I will check your data shortly (this week at least), however I also found issue with this a few weeks back before XMAS and the defects have since been addressed - there are issues with Template Export such as Materials dont carry with the template so while you get the "Layers" you dont get the Materials when you re import the file. Also Tables also dont carry because Tables are unique to a specific project. However if you are just creating simple start point Generic Templates - this tool is useful especially for Finished Grade Templates. The update is in the pending patch which we are trying to finalize currently.
I will check your files with the Daily Build for the Patch version, but my guess is you have hit the same issues that I did.
Retrieving data ...