I bring the matter up.
Yesterday I found that this is really happening.
In my case: Get_Attribute DF_FILE_LOGICAL_NAME from VDF6.
This command has no error in DF19.x and DF20 using the embedded database, even on Windows 10, Server 2019.
What changed in the recipe, was the implementation of SQL since the day 07/09/2021.
The first occurrence was on 07/13/2021, but I hadn't connected to that fact.
Reading all the articles about it, it seems more sensible at this point to use the command as written by Vincent:
I understand the difficulty in DAW trying to find this case, because it seems to be very vague.
At any given time the return to command simply returns blanks.