VirtualBox Error – Failed to open the disk image file Cannot register the hard disk UUID already exists.

Error:

Cannot register the hard disk ‘*.vdi’ {UUID_UUID_SAME}  because a hard disk ‘*.vdi’ with UUID {UUID_SAME} already exists.

Cause: 

OIM VirtualBox Hard Disk (.vdi file) with UUID {92957aa4-0f2b-4b4b-be1e-23db8e47393c} already exists, and trying to add another OPAM or OAM VirtualBox Hard Disk (.vdi file) with the same UUID {92957aa4-0f2b-4b4b-be1e-23db8e47393c}.

It is due to the fact that OIM VDI file was cloned or copied to be used as OPAM or OAM VDI.

Solution:

1. Open ‘Command Prompt’ run as ‘Administrator’
2. cd C:\Program Files\Oracle\VirtualBox
3. run the command: VBoxManage.exe internalcommands sethduuid “<Location of Existing Hard Disk>.vdi 
4. Copy the newly changed UUID – 635c3815-d489-47fb-90ab-9b0400a323be
5. Open the .vbox file located at C:\Users\rajes\VirtualBox VMs\OIMVBImage11.1.2.3
6. Replace old UUID with new UUID (from step 4)  – <HardDisk uuid=”{635c3815-d489-47fb-90ab-9b0400a323be}” 
7. Close the VirtualBox and open again, so that it can refer the new VDI UUID.
8. Add new VDI file, there will not be any error, as the conflict got resolved once you  changed the UUID to new one.