Have you logged out the user? Old session retains old permissions.

Can the user open Message Viewer by a direct URL in browser?

I'm creating a new SQL storage:

However I don't have "Next" button enabled. And if I press "Finish" I exit the WIzard.

How do I get to this screen?

Calling @Bob Kuszewski 
 

User needs USE permissions on the %Ens_MessageHeader resource to view Message Viewer page.

You can add custom role granting Use on the resource or add %EnsRole_Operator role to the user (note that it does add a lot more).

You can see it in the Management Portal:

Class User.DbtrClntGenerlInf Extends %Persistent [DdlAllowed]
{
}

Is it because I'm using the backported %ZJSON from Robert in Caché?

Likely. Ran your code and got:

{"int":12,"bool":true,"str":"TEST"}

Consider upgrading to InterSystems IRIS!

Please add a code sample to demonstrate your issue.

Here's my simple class:

Class test.json Extends (%RegisteredObject, %JSON.Adaptor)
{

Property int As %Integer [ InitialExpression = 4 ];

/// do ##class(test.json).test()
ClassMethod test()
{
    set obj = ..%New()
    set sc = obj.%JSONExport()
}

}

And in the terminal I get the expected output:

do ##class(test.json).test()
{"int":4}

To know how a particular DTL action translates into ObjectScript:

1. Open DTL class in Studio
2. Press Ctrl+Shift+V OR See Other Code Button
3. Check Transform method - it contains ObjectScript implementation for the DTL

From the docs

If a class has DependsOn=ClassA, it is redundant for it to have CompileAfter=ClassA
as well.

so I always use DependsOn.

As Ens.StreamContainer has a OriginalFilename property you can use that in your custom BO by specifying a subfolder ob request (so OriginalFilename  = /subfolderA/name.txt).

I would try to avoid the mixing of:

• technical issue - outputting file into one of the several subfolders based on a filename
• business issue - determining which subfolder to output file to based on extracurricular conditions

Operation/adapter should solve only one type of issues, either technical or business.

Compiler does build dependency tree. If you encounter some kind of the issue where your classes are not compiled in a correct order you might open a WRC ticket.

Use DependsOn keyword to provide hints to compiler.

It might sufficient to put your code just into a CODE Block of a BP generated with the wizard.

If you need to execute raw ObjectScript from BPL add assign activity and set status variable to the value of your classmethod. No need to add a code block.

Still, BP without BPL are quite easy to implement, here's the guide.

BP class object is your context.

Just add a property to hold your data.

Here's a Docker Hub image (not official, not certified) with multiple architectures.

Here's info on publishing multi-arch images. Some more info.

manifest command was successfully merged into docker codebase so it seems possible now.

What's your file I/O default?

zn "%SYS"
do ^NLS
Choose 4) Display loaded settings
Choose 3) Display system defaults for I/O tables

Here's what I got:

-------------- System defaults for I/O tables --------------
 
Table               Name
-----------------   ---------------
Process             RAW
Cache Terminal      UTF8
Other terminal      UTF8
File                UTF8
Magtape             UTF8
TCP/IP              RAW
System call         RAW
Printer             CP1251