Hello,
I did try the query, I don't get any result:
select d.* from cmis:document as d
where IN_TREE (d, '8af4943a-44c5-43f4-8049-b193392ca0c4')
ORDER BY d.cmis:lastModificationDate desc
but when I change IN_TREE with IN_FOLDER, it works fine:
select d.* from cmis:document as d
where IN_FOLDER (d, '8af4943a-44c5-43f4-8049-b193392ca0c4')
ORDER BY d.cmis:lastModificationDate desc
As far as I could find IN_TREE and IN_FOLDER are supposed to work the same way, except IN_TREE also contains sub-directories.
Any help would be highly appreciated 
André
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I did test with CMIS Workbench and Alfresco5.2.
Alfresco Share v5.2.f (r137983-b22, Aikau 1.0.101.10, Spring Surf 5.2.f, Spring WebScripts 6.15, Freemarker 2.3.20-alfresco-patched, Rhino 1.7R4-alfresco-patched, Yui 2.9.0-alfresco-20141223) Alfresco Community v5.2.0 (re21f2be5-b22) schema 10057