InDesign file cannot open

Hi - Trying to open an .indd file from 2000. Have tried in all previous InDesign versions back to 2000, and also on previous old iMacs and laptops. Always get this message: "Cannot open the file "resume.indd". 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."

As previously suggested in another thread, deleting an ~ace file would do the trick. Am not locating any pertinent file containing ~ace. I've also tried other suggestions in other threads. Nada. Any thoughts?? Thanks!