|In Group Edition there are restrictions with Custom Report Types.
- If a custom object X is created with relation to Opportunities (master-detail) then report can be done on Opportunities with Object X.
- Add another custom object Y with detail relationship to object X
- It is not possible to report on "Object X with Object Y", even though "Enable Reports" is checked when setting up the custom objects
- When the above steps are done in a Developer Org, there is an option to report on "Object X with Object Y".