Accessing Rational DOORS Requirements using OSLC_RM/DOORS Web Access
One answer
Comments
I fixed the issue, the queryBase link was not in the location specified in:
There were changes to the service discovery doc around 9.6.1.1 I believe, to optimize performance. So that may indeed be it.
The queryBase link you refer in the question (/dwa/rm/oslc/query/requirement), can be used to query only for links (collaboration links) which is database-wide.
To query on requirements itself, you'll need to use queryBase of specific modules you need. All queryBase links can be found only in Service Providers (which essentially are either modules or views). Link to Service Providers can be found in Service Provider Catalog (which are folders or projects). Figure 1 and 2 in that article should give an idea of how to navigate and find what you need..