Class Notifications_Subscriptions not found

I think last time I saw this error on a previous dev version, if you clear your cache it disappears. Try this.

i am facing this issue too

Fatal error: Class 'Notifications_Subscription' not found in F:\wamp\www\iiwy\sites\all\modules\notifications\notifications.module on line 646

its working after clearing my cache .

I'm getting this error, too, but clearing the cache (drush cc) isn't fixing it.

Note: It's Notifications_Subscription, not Notifications_Subscriptions

Notifications_Subscription is listed at the head of notifications.module in the autoload_info hook. It's defined in a .class.inc file in the includes directory. From there it's used as a class several times without preceding it with some kind of load-this-file instruction. The autoload_info hook probably sets up some mechanism somewhere to, uh, autoload stuff. But I haven't been able to find that.

../messaging/includes/drush_hack.inc - contains what they call a "hack" to cause notifications to work. This "hack" is not documented in anything that I could find.

The messaging module has a dependency on the "autoload" module, but where is it located?

Ah.. the autoload module is mentioned on the project home page, but not in the .info file. http://drupal.org/project/autoload

This is happening to me as well after updating autoload to 2.0 RC1

Please,

Don't change version, specially if its a different branch (2.x, 4.x).

Don't add into the mix development versions of other modules (Autoload RC?). If we need to update anything for new versions of Autoload, please add a different issue.

Now if someone still has this issue with Notifications 4.x-4.0-beta7, stable versions of all other modules, and after cache is cleared (manually, not sure whether drush actually clears this), feel free to reopen.

Fatal error: Class 'Notifications_Subscription' not found in /home/u2911/domains/****/sites/all/modules/notifications/notifications.module on line 646

6.x-4.x-dev 2011-Jan-21

solved by rolling back to 4.x-4.0-beta7

This problem is still/again present in 6.x-4.x dev.
Can't find the reason why...

The only solution that i actually found was to do a full load of the files in hook-init.

It turns out that after adding those _init loads, the system has a next problem on e.g. node view...

Is this somehow dependent of module weight? Do i need to reinstall those modules? Or is it even differentally - some old weights where in DB of our test system and that's why it remained working after upgrade?

It actually seems to me that some modules depend notifications.module but are loaded too early...

Ohhh ....

It turns our that a drush cc all sometimes is NOT enough... Autoload does not know enough after that.
We need to cc all via the admin menu ADDITIONALLY to make it work cleanly!

This is very strange but makes sense:
drush doesn't use tools like APC and possibly acts on the DB cache, while apache might access an own cache.
Actually we're using cacherouter and define own rules for caching tables. However i would expect that both drush and apache use the same source.

Any idea?

It seems it may be related to one of the following:

- Autoload version.
- APC, other advanced optimization or caching tools
- Module weights

Please, on next follow ups, report whether you are using any of these and which version.

As written, we needed to cc via drush AND via web browser.
This seems to be autoload+caching related.

I'll check what causes this issue and add it to autoload issue queue..
At least here some architectural things go wrong.

FYI - I've seen errors like these when using autoload-6.x-2.0. They go away if you use autoload-6.x-1.4. I believe the autoload API is different for 2.0...

Clearing thee cache did not solve anything for me.

uninstalling the notifications / messaging module and then
installing autoload and at last re-installing messaging and notifications solved it for me.

For a possible fix please see and review #1351782: Autoload classes not found on enable.