The error given is:
Only one root Folder is allowed in a Publication.
And it seems to throw that error when trying to import items in the Publication '000 Empty'.
Which is an indication that you are trying to import the
all-publications package on a CMS which already has a 000 Empty Publication, and specifically one with a root Folder named differently than Building Blocks.
Content Porter (and the Import Export API), can only import using WebDAV URLs, which means the Titles of your Folders, Structure Groups and other items need to be unique since they act as an identifier. So when trying to import an entire Publication structure like is done by the DXA import package
all-publications, you will either have to ensure the Publications that the import package contains do not exist, or are similar (in which case the import will merge the two).
In case you are trying to import DXA in an existing installation, I suggest you use the
example-publications option (see the documentation for details http://docs.sdl.com/LiveContent/content/en-US/SDL%20DXA-v6/GUID-EDB49D8A-DCC3-45E7-B809-6A8B377C4FEA). Or you need to rename the root Folder of your 000 Empty Publication into Building Blocks before the import (you can rename it back after the import if you wish, but remember to redo this action if you need to ever run DXA upgrade scripts on that system, since DXA will have the English defaults).
Okay I see your Existing BluePrint structure does not contain a Publication called 000 Empty, adding to that your mention of the CMS language that was set to Japanese, there is something else happening.
As mentioned before, DXA is created on an English CME, and hence uses the English default names for root Folders. If your CM language is set to Japanese, your root Folders in a newly created Publication will not be called Building Blocks, but I'm guessing something in Japanese. This is what seems to be causing our problem.
What is happening is the following:
- The Import Export API creates the 000 Empty Publication as part of the import
- A root Folder is automatically created using the defaults of the system (in your case that will get the Japanese translation of Building Blocks
- The Import Export API tries to import the items in the newly created Publication, and because the export has the root Folder names as Building Blocks, it fails since there already is a root Folder with a different name
Okay that is the explanation of what's going wrong (very interesting case by the way, we'll need to add some comments about this in the DXA documentation (I'll take care of that). Now lets look at the solution, I see two possible options:
You create a Publication called 000 Empty before you import, and rename its root Folder to Building Blocks, after this you should be able to import without problems
You change the CM language to English before the import (make sure there is no Publication called 000 Empty left behind from the failed import)
I think option #1 is the simples and quickest solution, which doesn't have too much impact. Let us know the results and we can add these details to the DXA documentation.