why does put revOpenDatabases() not work?

[william humphrey]

Thank you for fast answer.
Now there are four files

recipes (no extension)
recipes.blb
recipes.dat
recipes.ind

I can open the recipes (no extension) file with Valentina Studio and I can
open in RunRev the API way.

Now I change the name of recipes (no extension) to recipes.vdb and I can no
longer open it with Valentina Studio.

I remember that old versions of Valentina Studio had the option of creating
a database file that was "one file" (much more convenient). The present
version of Valentina Studio will not do that and will not open a file that
has the .vdb extension.

I will now see what happens in RunRev...