Eric, U&G were changed with v18 project mode. Check out the blog, I believe 
there was a posting there about it.

> On Apr 30, 2020, at 2:29 PM, Eric Naujock via 4D_Tech <4d_tech@lists.4d.com> 
> wrote:
> 
> I have found that if you take a 4D v17r5 program and convert it to v18. Then 
> change the database to a project database it will lose the memberships in the 
> users and groups. When exported you will see all your groups and users. But 
> the memberships between the two will disappear. With the exception being 
> “Designer” and “Administrator”.
> 
> Even worse. If you took a User to blob file saved in 4D v17r5 and import it 
> into v18 it will corrupt the minimal users and groups file created when the 
> database was converted. Effectively all the groups will disappear and corrupt 
> groups groups will come into existance.
> 
> A curiosity is that the designer and administrator will keep their 
> memberships, but all the other users will lose the relationships. I have 
> noticed the the new directory.json no longer has user numbers. I suspect this 
> may be part of the problem. This is certainly causing issues with my linking 
> users to their [Employee] table records. The user number used to be a 
> constant and I would use it to tie a user to an employee record with a simple 
> Longint.
> 
> Can anybody verify this is true or not.  Or is there something really simple 
> that I am missing. The good thing is that my users and groups are pretty 
> small so I can manually recreate the directory.json file. Then make a backup 
> of the file in my v18 project. 
> 
> I am using the method of saving the directory.json file in the dat folder to 
> keep my users and groups constant between versions of the database. 
> 
> I remember there was a discussion about users and groups in the past and 
> issues with import-export of the data to a blob.
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Later,
Guy

--
Guy Algot, Solutions Specialist
Edmonton, Alberta
(780) 974-8538

hardware, installation, training, support, programming, internet
specializing in 4th Dimension
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