When I create a set of cross sections for the first time in a given session, everything seems to be fine. When I go to create another set, I go back to my Default 2d model. I click the tool to create cross sections, then select the next alignment. Then the Create Cross Section window comes up, but immediately another window comes up and says Duplicate stations not allowed.
I believe this message pertains to custom cross section sets which have multiple entries at one given station. In this case, because I'm starting to work with another alignment, it probably basically changes all of the out-of-range stations to the beginning or end of the alignment, and then it raises this message.
I know that when I click OK, then close the file, then re-open it, it will work fine. It's worth noting that the first time in any session, it works, which tells me that the processor identifies out-of-range sections and relocates them only after the first time cross sections are created.
Edit: When I tried immediately a few more times prior to typing this, it continued to report duplicate stations. When after typing this I tried again without closing the file and re-opening, though, it worked fine. Maybe it's a timing issue. Or maybe something triggers a reset and then it works fine again.