API Call failed with message: "File <unspecified filename> is larger than the maximum size (4047097)

vRangerPro fails backup with error message: API Call failed with message: File <unspecified filename> is larger than the maximum size supported by datastore '<unspecified datastore>'

vmdk filesize exceeds the maximum filesize for the datastore

The error is occurring when a snapshot is being made. If the vmdk filesize exceeds the maximum filesize for the datastore, ESX will be unable to create a snapshot.

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1012384

For VMFS versions prior to 5.0

1 MB block size = 256 GB maximum filesize
2 MB block size = 512 GB maximum filesize
4 MB block size = 1024 GB maximum filesize
8 MB block size = 2048 GB maximum filesize

For all block sizes for VMFS versions of 5.0 or greater

2048 GB maximum file size

Currently there is no workaround other than create a new datastore with a new blocksize that can support the filesize of the vmdk or move the VM to a datastore formatted with a larger block size.