Opus should detect changes to folders automatically, but there are some things to check first:
- Fully exit Opus and restart it, in case the problem is with the Windows change-notification system losing track of the request from Opus to listen to changes on the drive(s) in question.
(Note: Do not just close & re-open all your Opus windows; that does not exit the program by default.)
- Go to Preferences / Miscellaneous / Advanced and makes sure no_external_change_notify is set to False (which is the default).
- Check that Windows Explorer is able to see changes on the same drive. If not, the drive may not be sending change notifications at all (or may be sending them, but very slowly; see the Samba point below).
- If it's a network drive, make sure Preferences / File Operations / Options: Detect external file changes on network drives is turned on (i.e. there should be an X in the checkbox).
(Opus 8 and earlier: The checkbox was under General rather than Options.)
- If it is a network drive on a non-Windows system then it is probably shared using Samba at the other end. Because most Unix/Linux filesystems do not support change notification, many versions of Samba implement notification by polling the drive every X seconds, where X is configurable on the server but defaults to something quite large, sometimes a couple of minutes. This means you often don't see changes made to Samba network drives for a long time, if it was something other than Opus which made the change. Very old versions of Samba do not support change notificaiton at all.
- If you are using Opus 8 (or earlier), and it's a local drive mounted using an NTFS junction then your version of Opus won't be able to detect the changes. However, Opus 9 (and above) shouldn't have any problems seeing changes through junctions.
- If none of the above are true and you want to try debugging the problem then you can enable debugging in the following way:
Directory Opus 9 and above:
Directory Opus 8:
- Go to Preferences - Miscellaneous - Advanced and set notify_debug to True.
(Also set shellchange_debug to True if you are having issues with the folder tree.)
- Download the small DebugView tool from Microsoft and run it. If you see an error message about extracting Dbgv.sys you can ignore it as we are not interested in debugging device drivers.
Note that other programs may also send messages to DebugView and it is possible that some of the output you see will not be from Opus.
- When you are done debugging, quit DebugView and turn off the notify_debug and shellchange_debug settings in Opus.
Presumably the problem will manifest in one of two ways: Either no change is detected at all or a change is detected but for a path that is different to the path Opus thinks it is viewing.
- Point RegEdit at HKEY_LOCAL_MACHINE\Software\GPSoftware\Directory Opus and create an empty String value called NotifyDbg.
This will cause a debug window to appear when the next change is detected by Opus.
- When you are done debugging, delete the NotifyDbg registry string and restart Opus.
If you don't see any changes at all, create and delete a couple of files on C:\ to make sure the debug output is appearing. Even when notification is working fine it might take a few events to trigger the debug window to appear. The best bet, once you're in a situation where notification isn't working, is to switch on the debugging mode, then create/delete some files on C:\ to make sure the debug window is visible, and only then start to make some changes in the folder that's having problems to see if any debug information is displayed for it.
- A tool that may come in handy when diagnosing these problems is ProcessMonitor (which is the newer, combined version of FileMon and RegMon; not to be confused with ProcessExplorer by the same people).
If Opus doesn't detect any changes, see if ProcessMonitor sees them and what it sees.