Hello Charemma,

Would you try Safe Mode to see if maybe an ad-on (if you have any) is causing this ?

https://support.mozilla.org/en-US/kb/safe-mode-thunderbird

This is still not working..

Do not have any add-ons either.

Still coming up with the option of 'open message in conversation' but when click on this nothing happens?

I'm going to flag this and ask a moderator to move this to Thunderbird support .....

Charemma said

Do not have any add-ons either.

As you don't have any add-ons - when you're in Safe Mode, would you please check the box "Reset toolbars and controls" and click "Make changes and restart".

Any luck ?

Unfortunately this still does not work...

I have been tried both above suggestions a few times now and still nothing  :(

I have even tried removing my account then adding it back and waiting for my emails to sync up again. However, this has also not helped and still can't open messages in conversations...

I have just forwarded this thread to someone who might be able to help - but I don't know when he'll be around though .....

Thank you for passing this on - hopefully this can be resolved!

Charemma said

Thank you for passing this on - hopefully this can be resolved!

While you're waiting for that contributor whom I contacted - maybe someone else will see this thread and come up with the perfect solution - who knows (fingers crossed !).

The person I contacted to take a look at your problem : I just noticed that he hasn't "been around" the past eleven days - he may be on vacation ......

I sure hope that someone else will see this and come to your
rescue  !

Try rebuilding the global search database and see if it makes any difference:

https://support.mozilla.org/en-US/questions/1065805#answer-741231

https://support.mozilla.org/en-US/kb/rebuilding-global-database

Help/Troubleshooting Information, click Show in Finder to open the profile folder, close TB, delete global-messages-db.sqlite, restart TB, allow the index to rebuild.

After rebuilding global database the open message in conversation is working again!

So pleased! :)

Thank you both for your help!

I'm so pleased that your problem is solved - was about time, eh ?

Would you be so kind as to mark sfhowes' post as Chosen Solution ? ("Solved Problem" button to the right of his post)

Thank you in advance  !