Error : "Cannot create a quiesced snapshot" (75963)

Message: An internal error occurred during execution, please contact Vizioncore support if the error persists. Error Message: API Call failed with message: Cannot create a quiesced snapshot because the (user-supplied) custom prefreeze script in the virtual machine exited with a nonzero return code.

User is trying to run a quiesced backup with vzshadow custom batch script. Error is displayed in vRanger and vCenter as well.

Backup fails of single VM.

Please check for mistakes in the script/batch file.If this is not the case follow those steps:

Here are a few articles that discuss this issue:

http://communities.vmware.com/message/890786

http://vikashkumarroy.blogspot.com/2009/08/creating-quiesced-snapshot-failed.html

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1006671

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=5962168

http://kb.vmware.com/kb/1006671

1. Backup the following regkey: HKLM\Software\Microsoft\EventSystem\
2. Erase the regkey HKLM\Software\Microsoft\EventSystem\{26c409cc-ae86-11d1-b616-00805fc79216} and below
3. Reboot.
4. Verify that things are working by running
vssadmin list writers
vssadmin list providers.

and then in the services.msc list of services snap ins, make sure the following services are Started Automatically:
1. COM+ System Application
2. Distributed Transaction Coordinator
3. Volume Shadow Copy
4. VMware Physical Disk Helper Service


Automatically but not started:
1. Microsoft Software Shadow Copy Provider
2. VMware Snapshot Provider

Also after migrating a machine to a different host may fix this problem as well.