No luck reproducing (but I'm in the 08.11.07.615 release). So here are some questions:
1.) Does it crash on any network in any SDB file? What if you create an SDB with one pipe?
2.) Are you using the RPL delivered with InRoads (C:\Program Files (x86)\Bentley\InRoads Group V8.11\Data\Report.rpl), or are you using a different one?
3.) Do you have the 615 build lying around anywhere so you could try that version?