Disaster Recovery: Error: "Object reference not set to an instance of an object."
Issue
This article is about cause and possible solution for the following error that occurs when attempting to export a VMDK files to a VSphere client:
"An internal error occurred in the vSphere Client. Details: Object reference not set to an instance of an object."
Environment
- Datto SIRIS
Cause
A missing line in the .vmdk file can cause this when VSphere tries to get the sparse image of the Datto export.
Resolution
- Download the .vmdk file from the datastore, and place the following line in the .vmdk file through a text editor. Be sure to use lower case letters.
ddb.adapterType = lsilogic
. If this already exists, make sure it's properly written and that the text is in lowercase. - Re-upload the .vmdk to the datastore and attempt to re-attach the disk files.
- If this issue continues to persist, please contact Datto Technical Support for further assistance.