Element not valid for tool when trying to run a report

We've imported survey data and referenced our 2D alignment file.  We are now trying to run a station offset report.  First, it asks to select the alignment we wish to have offsets from and we do.  Next, it asks to select the elements we want the station/offset of.  We aren't able to select any of the elements in the file as all of them say "element not valid for tool".  We are unsure what's causing this.