Hello, I have some troubles to add documents to the specific collection with pf:add-doc(string uri, string documentName, string collectionName), here's what I tried : pf:add-doc("c://bib.xml","bib.xml","myCollection") <> pf:add-doc("c://book.xml","book.xml","myCollection") <> pf:add-doc("c://helloworld.xml","helloworld.xml","myCollection") <> I allways have the same error message : ERROR: __shred_into_docBAT:bat(old_10000000XX_qn_nid) does not exist!!!! with XX two numbers which change. Note that it only happens the third time I decide to add a document to a specific collection (weird is'n't it?) it means that I tried to add several documents with only one command (as it is shown in the tutorial) and I managed to put 3 documents in the collection, even one more and then I get the same error (the third time I add documments). I work on V4.18.0 from the download page MonetDB4-XQuery-i686-0.18.2.msi, windows platform. I first ran the commands through java interface but I got the same results with the MapiClient. Has anyone the same problems? Am I doing someting wrong? Thanks for your help.