Dose this findscu command legal?

[hamlet]

Hi,
I use findscu to find patient info.

findscu -v -d -k 0010,0010="" -k 0010,0020="" -k 0008,0052="STUDY"
-k 0008,0020="-20020101" -k 0008,0030="" -k 0020,000D="" -P -aet CDRHamlet -aec Test_SERVER 192.168.0.XX 104

Patient Root Study Level
I want to get studyDate before 20020101 and I want to get
1. Patient Name
2. Patient ID
3. StudyDate
4. StudyTime
5. Study Instance UID

But the server return error for "Invalid Level".

I change params to 0010,0020="*"

findscu -v -d -k 0010,0010="" -k 0010,0020="*" -k 0008,0052="STUDY"
-k 0008,0020="-20020101" -k 0008,0030="" -k 0020,000D="" -P -aet CDRHamlet -aec Test_SERVER 192.168.0.XX 104

It works, but it dosen't return Patient Name.
When I use "-S" (Study Root), it works fine.
I'm sure server support Patient Root/Study Root.

I test this command on other servers, they are ok.

Are there bugs in server?
or is my findscu params illegal?

[hamlet]

I read the PS 3.4-2004 C.4.1.3.2.1 Relational-Queries
Maybe I use findscu is relational query.
Some servers get CFind without extended negotiation, they always use relational queries, and some servers don't.

Is it right?

[Jörg Riesmeier]

StudyDate is a required matching key on STUDY level and not on PATIENT level.

Relational queries are an extended behavior which has to be negotiated separately. Most Q/R implementation will not support this model.