Links to other error code pages can be found on the Virtual Machine Manager (VMM) 2008 R2 Error Codes page.

To find a specific error message in this table, type Ctrl-F and enter the error code. If you have additional information about how to fix an error, add it to the "Additional Troubleshooting Information" column.

Code
Message
Recommended Action (in product)
Additional Troubleshooting Information 
501
The virtual machine host %ComputerName; cannot be removed because one or more virtual machines are active on the virtual machine host.
All virtual machines must be deleted from %ComputerName; before the Host can be deleted. Delete the virtual machines, and then try again.
502
The selected network adapter does not exist on the virtual machine host.
Verify that the adapter is in the list obtained by running Get-VMHostNetworkAdapter -VMHost (Get-VMHost -ComputerName %ComputerName;).
503
The specified virtual network %VirtualNetworkName; does not exist.
Verify the virtual network name by refreshing the Host Properties dialogue box, go to the Hardware tab and click the Virtual Network option. Then try the operation again.
504
The virtual network %FriendlyName; already exists on the virtual machine host.
Check the virtual network name, and then try the operation again.
505
Virtual Machine Manager was unable to create a new virtual network %FriendlyName;.
Check the virtual network name, and then try the operation again.
506
The virtual network name %VirtualNetworkName; contains a character that is not valid.
Check the virtual network name and then try the operation again. For a host that is running Virtual Server, a virtual network name cannot contain any of the following characters: *?:<>/|\"
507
All associated virtual machines will be disconnected. Are you sure you want to delete this virtual network?
BLANK
508
A virtual network name must be provided.
Enter a valid virtual network name, and then try the operation again.
510
A virtual network path was not selected.
Select a virtual network path, and then try the operation again.
511
The IP address is not valid.
Enter a valid IP address, and then try the operation again.
512
The network IP address must be the base of the subnet.
Enter a valid IP address that is the base of the subnet, and then try the operation again.
513
The IP address is not valid. The host server reserves the first 16 IP addresses for its own internal use.
Enter a valid IP address outside the range of first 16 reserved addresses, and then try the operation again.
514
The ending IP address is not in a valid range. The last valid address of the subnet is reserved.
Enter a valid IP Address within the range, and then try the operation again.
515
A valid default gateway address must be either part of same network or left blank.
Enter a valid gateway address, and then try the operation again.
516
The DHCP settings could not be saved. The DHCP Server address is not in a valid range. DHCP Server address should be between the first valid IP address and starting IP address.
Enter a valid DHCP server address, and then try the operation again.
517
The IP address lease time that has been entered is not in a valid range. The maximum value is 49710 days.
Enter valid lease time value, and then try the operation again.
518
The network mask is not valid. The network mask format should be xxx.xxx.x.x.
Enter a valid network mask, and then try the operation again
519
While Virtual Machine Manager is applying the changes, the host may temporarily lose network connectivity. This may have an adverse effect on other network operations in progress. \n\nDo you want to continue?
BLANK
520
The virtual machine paths %PathName; are not present on the host. Verify that all selected virtual machine paths exist on the host, and then try the operation again.
BLANK
521
The lease renewal time must be less than the lease rebinding time. Also, the lease rebinding time must be less than IP address lease time.
Enter a valid lease time, and then try the operation again.
522
The minimum value allowed for IP lease time is 60 seconds.
Enter a valid lease time, and then try the operation again.
523
The minimum value allowed for lease rebinding time is 45 seconds.
Enter a valid lease time, and then try the operation again.
524
The minimum value allowed for lease renewal time is 30 seconds.
Enter a valid lease time, and then try the operation again.
525
Agent installation failed on %ComputerName; because of an incompatible operating system version.
Ensure that %ComputerName; is running either Microsoft Windows XP or Windows Server 2003 operating system.
526
Host configuration failed on %ComputerName; because no virtual machine paths are specified.
Ensure that at least one virtual machine path is specified.
527
All network adapters bound to this virtual network will be disconnected. Are you sure you want to continue?
BLANK
550
VMM cannot access registry key %RegistryKey;.
Verify that the registry key exists, and then try the operation again.
551
VMM cannot access registry key value %RegistryKeyValueName; under %RegistryKey;.
Verify that the registry key value exists, and then try the operation again.
552
The registry key syntax %RegistryKey; is incorrect.
Ensure that the key is not empty, contains only valid characters and is less than 255 characters.
553
The type or name syntax of the registry key value %RegistryKeyValueName; under %RegistryKey; is incorrect.
Ensure that the type of value name is correct; the name is not empty, contains only valid characters and is less than 255 characters.
554
Permissions have not been granted to access the registry key %RegistryKey;.
Verify permissions on this registry key, and then try the operation again.
555
The operation on the registry key %RegistryKey; was not successful. A system error occurred, such as deletion of the key, or an attempt to create a key in the LocalMachine root, or the nesting level exceeds 510.
Verify the registry key properties, and then try the operation again.
556
VMM cannot delete the registry key %RegistryKey;. The subkey does not specify a valid registry subkey, has child subkeys or deletion of a root hive has been attempted.
Verify that the registry key is present, and then try the operation again.
557
You must enter at least one virtual machine path.
Add a default virtual machine path, and then try the operation again.