Hello,
Hope you have solved the issue already.. Just would like to know few things..
1) Whether the dump is occurring during the activation of the business function or after? (activating Business Function is Basis job why your functional consultants are doing this?)
2) Whether the Business function activation job was completed successfully? If not, this could be the issue, even reactivating the business function wont solve the issue.
2) Only way I think is that you need a restart.. Reason being the activation job if it had a deadlock and failed you have inconsistency with the data, meaning the database might have been updated with activation changes but the buffer in SAP still is in same old status. In this case you need a restart where it could solve your issue.
Please let me know.
Regards
Hari Narayanan