• activate go2wpForo
• start the migration

The tool only has options for migrating from other platforms to wpForo not wpforo to wpforo.

Here is already explained the steps: https://wpforo.com/community/postid/19551/

If you want to Migrate wpForo to a new domain just follow the instruction provided in this support topic: https://wordpress.org/support/topic/move-to-new-domain-2/

Thanks I understand and have completed the task. 👍 

Can you please tell me what you understood?I'm confused because as you mentioned in the second to last post "The tool only has options for migrating from other platforms to wpForo ( see below) not wpforo to wpforo."

Thanks for the response and advice, however I'm probably being stupid but I cannot see how I would use the go2wpforo tool to merge my two wpForo sites into one. The tool only has options for migrating from other platforms to wpForo ( see below) not wpforo to wpforo.

go2two.jpg

Just to confirm what I'm trying to achieve.

I have two wordpress installations with two Wpforo forums, I need to merge them into one forum. Both exist on the same pro hosted server.

I would like the newly migrated site (site 1) merged into the one I started two years ago (site 2).  Data below.

Details

Site 1 : This is the site was migrated yesterday from PHPbb3 to WpForo
www.vrat.co.uk
Running on wordpress 4.9.8
running Wpforo 1.5.3
This site has 67.7K posts, 4,312 topics

Site 2 : This is the Wpforo site I've been running for the last two years. I want the site above merged into this one.
www.Radios-TV.co.uk
Running on wordpress 4.9.8
running Wpforo 1.5.3
running wpforo plugins: 
advanced attachments, Ads manager, custom fields, cross posting, embeds and polls
This site has 18.5K posts. 1.408 topics

Or are you saying I need to run the migration again? That I should install the go2wpforo tool on site 2 (www.radio-tv.co.uk)  and migrate the phpbb3 forum directly into it. That it will not cause any problems with existing content. 

Sorry If I'm not understanding, if you can help to explain a little further it would really help.

As far as I understand you've created a new wpForo forum and also migrated your phpBB forum to new wpForo. Now you'd like to merge this two forums. If so, please follow these steps:

1. close your forum until you've finished this process. 
2. backup your website database, all WordPress tables with wp_.
   Please note wp_ is just a default WordPress database table prefix, your database cannot use this prefix (wp_wpforo_ tables is required)
3. download the new Go2wpForo version 
4. activate go2wpForo
5. start the migration process to the current website (there is a wpForo with which you are going to merge the old forum)
   5.1During the users' migration process there won't be users duplication. This means that if it finds the user with email@email.com (that already exists in your new wpForo forum) it won't create the new user it will merge the content with this user content.   
   5.2 If the user changes his/her email and you know that this user already has an account your new forum you can simply merge the contents as well. Info here:
   https://wpforo.com/docs/root/members/member-manager/#action-buttons
6. After this, you'll find the new migrated category.
   Here you can manage whatever you like. You can delete those or merge with the forum that already exists. Please note you can only manage each forum
   http://www.screencast.com/t/nO8HtwlQ
7.  Then navigate to Dashboard > Forums > Dashboard and click on all the buttons of Maintenance section (delete cache, reset statistic, etc...)

I removed and reinstalled the tool and this time I've had success.  👍 

My old PHPbb3 now resides in a nice brand new WpForo installation, very pleased about that.

Advice Required

The forum I migrated today, I started on phpbb3 back in 2011. Around 2016 I wanted to move over to Wpforo but at the time there wasn't the migration tool to do it so I closed the phpbb3 forum and started a new one on Wpforo. All my members came over to the new but kept asking when the old forum might be updated. I've been patiently waiting for the migration tool and today that patience paid off when you guys released the support for phpbb3 migration. 

Now I have my old forum (70,000+ posts) on WpForo and the one I started in 2016 (20,000+ posts) on Wpforo. Wheat I would really now like to do is merge them into one forum... reunification so to speak!

Everything is at one host on a pro server hosting package.

Would you guys be able to provide a script to merge the two into one, preferably the one I migrated today(70,000+ post) into the other one (20,000+ posts).

I'm prepared to pay for your services, hope you can help

Ok,Thank you @cmw14,

I think the tool cannot connect to your phpBB database or something so. First please deactivate the tool and activate it again. Then make sure you fill table prefix of phpBB database correctly. This error only comes when the tools SQL queries returns zero forums, topics and posts.

And please leave a screenshot of the Statistic Section on the 3rd step of migration, I want make sure it finds all phpBB Forums, topics and Posts.

Also please let me know which phpBB version you're trying to migrate?