Hallo,
vielleicht kannst Du damit was anfangen:

If you are creating, moving and deleting document library objects you are bound to accumulate a lot of documents that do not belong to any folder. I refer to them as unassigned documents. These documents belonging to folder *NONE occupy a lot of space on the disk. You can perform the following steps to identify and delete such documents:
Display all unclaimed documents to a physical file:
QRYDOCLIB FLR(*NONE) OUTFILE(QTEMP/DOCPF)
Print a list of all such documents in owner and size order:
STRSQL
SELECT QDLUID, QDLONM, QDLDNM, QDLDSZ, QDLFLR FROM QTEMP/DOCPF ORDER BY QDLUID, QDLDSZ, QDLDNM, QDLFLR, QDLONM
Save all such documents to a save file:
CRTSAVF FILE(QTEMP/SAVDLO)
SAVDLO DLO(*SEARCH) FLR(*NONE) DEV(*SAVF) SRCHTYPE(*DOC)
CRTDATE((000000
010190)) OWNER(*ALL) SAVF(QTEMP/SAVDLO) OUTPUT(*PRINT)
Save the save file to a tape for future retrieval.
Delete the unclaimed documents created by a specific owner by using following command:
DLTDLO DLO(*SEARCH) CRTDATE((000000 010190)) OWNER(owner-name)
USER FEEDBACK TO THIS TIP
I'd use the following command to delete documents found using this tip: DLTDLO DLO(*SYSOBJNAM) SYSOBJNAM('DLO_ObjectName') —Kenneth Graap, Search400.com site expert