VST rack crash

Hi,
I’m getting crashes when turning on or off the VST Rack either manually or in write mode.
It’s intermittent but enough to be causing a headache.
Anybody have a solution for this?

Thanks,
Mike

Problem signature:
Problem Event Name: APPCRASH
Application Name: Cubase6.exe
Application Version: 6.0.7.364
Application Timestamp: 4f5f87d6
Fault Module Name: Cubase Plug-in Set.vst3
Fault Module Version: 3.1.2.420
Fault Module Timestamp: 4f5f72f7
Exception Code: c0000005
Exception Offset: 002f4cbb
OS Version: 6.1.7601.2.1.0.256.4
Locale ID: 2057
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789

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