I wonder if the problem might be that "pfss_time2file" and "pfss_restore" are in the IDL 8.2 path but not the IDL 8.3 path. Try opening the .pro files using the ".edit" command. For example:
.edit pfss_restore
If this doesn't work then these routines might not be included in the IDL path. You can modify the IDL_PATH using the PREF_SET command:
http://exelisvis.com/docs/prefs_directory.html
http://exelisvis.com/docs/PREF_SET.html
Or by using projects:
http://exelisvis.com/docs...entWithProjects.html