I'm getting this error while trying to add comment in model environment in E3D 2.1. I guess this is DB administration issue.
So far I've found note in administration user guide:
[LIST] [FONT=courier new]In AVEVA E3D?, the commenting world should not be created in the Design database, but in the commenting database. However, in earlier versions such as AVEVA 12.0 SP 4 the Commenting World should be created in the Design DB.[/FONT]
[/LIST]
So how do I create commenting world or which attribute in my working DB should I change to make it work? Or should I create new one with Type other than DESI?
I'm not really familiar with administration module but I hope it's easy to fix.
Thank you for your reply, found that kind of DB in APS test project, according to that I've made the same db under existing PIPING Team as MASTER XPRD Type database under Piping MDB. I also included it into MDB Explorer tree in Modify Multiple Database option.
Anyway it didn't helped, same error occures. New database is in same folder as others included in custom evars file. What else could be wrong.
edit. I managed to find in User Bulletin that I should create model view world MVIWLD and Comment world CMTWLD to make commenting available, how to do that properly?
edit2. I found out that there's no WORL * element in my project CrossProduct Explorer in Lexicon module so I can't add MVIWLD and CMTWLD elements. Where can I create it because I guess it's new feature and I have only Lexicon Guide for E3D v1.1 where it's not described.
[FONT=courier new]In AVEVA E3D?, the commenting world should not be created in the Design database, but in the commenting database. However, in earlier versions such as AVEVA 12.0 SP 4 the Commenting World should be created in the Design DB.[/FONT] 
