We are working with InDesign CS5.5 and Jostens YearTech software Page Wizard - CS5.5 - 18.10 and getting an error we have never encountered in the past. We used YearTech last year without any issues but so far this year the programs have not worked together properly. Here is the error message we are getting if anyone could help us out with this.
Error: Error: Cannot open the file "Page Template 2015.indt". Adobe InDesign may not support the file format, a plug-in that supports the file format may be missing, or the file may be open in another application.
Only two things I can think of...though if I recall the messages differ.
One, there is a *.idlk (an InDesign lock file) in the folder with the template where the asterisk in the preceding is the name of the template file.
Two, the template was opened and saved in a newer version of InDesign.
That error generally means exactly what it says -- the file is locked, or it isn't really the right kind of file. It's amazing how many times people just change file extensions, or try to open a PDF or jpeg directly.