Level Crash UCameraAnimInst::SetDuration()

I’m having problems when playing a level that has landscape and foliage in it. After playing for a few minutes inside the level a crash is generated but the crash reporter doesn’t show anything too specific. The crash reporter shows the following:
UCameraAnimInst::SetDuration()
ConvertQueryImpactHit()
RaycastSingle()
UWorld::LineTraceSingleByChannel()
UKismetSystemLibrary::LineTraceSingle()
UKismetSystemLibrary::execLineTraceSingle()
Many tests have been done to see if maybe line traces generated by characters are the problem, or physical materials in the landscape. All matinees and extra cameras have been deleted also but nothing seems to work. All other levels in the game are working except this one. Can anyone shed some light into what causes this strange crash.