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cobian
#1 Posted : Sunday, October 9, 2011 11:07:38 PM(UTC)
cobian

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In version 9, the Volume Shadow Copy requester was part of the engine. Because the program is a 32 bit executable, that caused the the VSC feature didn't work at all on 64 bit systems. In version 10, this problem was solved by building the requester as a separated .NET service. Because .NET programs have the wonderful property to be compiled as 32bit executables on 32 bit systems and as 64 bit executables on 64 bit systems, the problem was solved.

Now the engine needs to communicate with the Volume Shadow Copy requester via pipes to command it to create a snapshot before the backup begins. If you get the error "Cannot contact the Volume Shadow Copy service" you need to check that the VSC requester is installed and running:

1- Check Options-General-Service and application control-Settings
2- Check if the VSC requester is installed and running
3- If it's installed, but not running, try to start it from there
4- If it doesn't start, make ***sure*** that .NET 3.5 is installed. Sometimes it may appear as installed but some components may be missing.

Be aware that you need *exactly* the 3.5 version. .NET versions are often NOT compatible, so if you have version 4 installed, you STILL NEED 3.5 for this requester to work.
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