[BUG] Missing optional parameter HyperVGeneration fails Image creation

Creating Image resource without providing the HyperVGeneration properties fails with the following error: InvalidParameter Message: Required parameter ‘hyperVGeneration’ is missing (null).

The HyperVGeneration is an optional parameter and creation call should succeed without specifying it (and be defaulted to its default value ‘V1’)

To Reproduce Steps to reproduce the behavior (include a code snippet, screenshot, or any additional information that might help us reproduce the issue)

var image = new Image
            {
                Location = "southeastasia",
                StorageProfile = new ImageStorageProfile
                {
                    OsDisk = new ImageOSDisk
                    {
                        OsType = OperatingSystemTypes.Windows,
                        OsState = OperatingSystemStateTypes.Generalized,
                        BlobUri = "https://myblob.blob.core.windows.net/uploads/some.vhd",
                        Caching = CachingTypes.ReadWrite
                    }
                }
            };

var result = await computeClient.Images.CreateOrUpdateAsync("rg", "name", image);

Environment:

• Microsoft.Azure.Management.Compute - fails with 31.1.0, 32.0.0, was working with 23.2.0
• OS and .NET runtime version: Windows 10 .NET Framework 4.7.2]
• IDE and version : Visual Studio 16.4.3

[Vaibhav-Agar]

Hi @joerage, The requirement to provide the hyperVGeneration property is enforced when an image is created from a blob or a disk resource (where we can’t determine the hyperVGeneration). This enforcement was done using a new api-version that started supporting Gen2 VMs. So, in this case you can specify the hyperVGeneration property when creating the image or update DiskRP resource with the hyperVGeneration property.

Our API docs and error message doesn’t reflect the right messaging and we are rolling out updates to fix them both shortly.

[Vaibhav-Agar]

Apologies for the delay here but to update, we are currently working on a fix.