Instruments Crash after launching the app from appium

I am trying to run my iOS app on version 8.1 with both appium 1.3.4. I am getting a crash as soon as the app launches. And then my test begins to look for the element to click. I am using Xcode, Instruments version 6.1. I am getting the same crash when I try it on simulator and real device. I am getting errors like,

  • Instruments exited with code 0
  • Trying to start a session but instruments is still around
  • (UIKitApplication:com.williamhill.vegasevo.enterprise[0xaa9b][44527]): Service exited due to signal: Abort trap: 6

I have attached the log below. Could you please help.
: Crittercism - net data collection enabled, frequency: 10s

info: [IOS_SYSLOG_ROW ] Mar 24 21:59:52 SH-iPad-3 locationd[55] : Gesture EnabledForTopCLient: 0, EnabledInDaemonSettings: 0

info: [debug] [INST] 2015-03-24 21:59:52 +0000 Debug: target.frontMostApp().alert().buttons()[2].tap()

info: [IOS_SYSLOG_ROW ] Mar 24 21:59:52 SH-iPad-3 Vegas Flagship Neue[200] : negative or zero item sizes are not supported in the flow layout

info: [IOS_SYSLOG_ROW ] Mar 24 21:59:53 SH-iPad-3 Vegas Flagship Neue[200] : *** Assertion failure in -[UICollectionView _endItemAnimations], /SourceCache/UIKit/UIKit-3318.16.21/UICollectionView.m:3917

info: [IOS_SYSLOG_ROW ] Mar 24 21:59:53 SH-iPad-3 ReportCrash[203] : task_set_exception_ports(B07, 400, D03, 0, 0) failed with error (4: (os/kern) invalid argument)

info: [IOS_SYSLOG_ROW ] Mar 24 21:59:53 SH-iPad-3 ReportCrash[203] : ReportCrash acting against PID 200