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V2V VMware to Hyper-V Failing
Posted: Fri Feb 28, 2025 11:49 pm
by tommytwotone
Hi, I am using V2V to convert VMware machine to Hyper-V. I powered off the VMware VM. I provided the remote source VCenter, and remote destination Hyper-V server, and Virtual Machine Path. I click 'Finish' and the conversion starts. The 'Converting' screen displays and shows 0%. Then, a few seconds later it jumps to 100%, and the 'Conversion Log' displayed on screen shows these four time stamped events:
1. Started
2. Opening Image File
3. Success
4. Creating Image File / Error creating image / Invalid parmeter. / Conversion failed.
I checked the log file and I see 'INFO' entry "...pathOutput: D:\VMs\Test-AsbCoLWca01\Virtual Hard Disks\Test-AsbCoLWca0.vhd". then, a few lines later I see 'ERROR' entry "...CVHDXFile::NewFile: File extension is not VHDX."
So, why does the PathOutput list a VHD extension, but as per the error it seems like it wanted a VHXD extension? Does this have anything to do with the failure? Any help is appreciated. Thanks.
Re: V2V VMware to Hyper-V Failing
Posted: Sat Mar 01, 2025 4:47 am
by yaroslav (staff)
Please share the entire log and try converting an individual disk as a file.
Re: V2V VMware to Hyper-V Failing
Posted: Sat Mar 01, 2025 4:50 am
by mcreedjr
I'm having the exact same problem in the exact same scenario down to the exact same error message.
Re: V2V VMware to Hyper-V Failing
Posted: Sat Mar 01, 2025 4:53 am
by mcreedjr
See below for log:
Code: Select all
2/28 23:44:01.437 1eb8 Facility ???INFO: CV2V_ConverterApp::InitInstance: SetDllDirectory: C:\Program Files\StarWind Software\StarWind V2V Converter\lib
2/28 23:44:01.437 1eb8 Facility ???INFO: CV2V_ConverterApp::InitInstance: File Version: 9.0.1.623
2/28 23:44:01.437 1eb8 Facility ???INFO: CV2V_ConverterApp::InitInstance: Load language IDR_XML_ENGLISH
2/28 23:44:01.437 1eb8 Facility ???INFO: CV2V_ConverterApp::InitInstance: Set current language English
2/28 23:44:01.437 1eb8 Facility ???INFO: CPS_V2V_Converter::CPS_V2V_Converter: Version MajorVersion 10, MinorVersion 0, BuildNumber 20348
2/28 23:44:01.437 1eb8 Facility ???INFO: WrapperHyperV::WrapperHyperV: LoadLibrary C:\Windows\system32\wbem\wmiutils.dll - 7d4d0000
2/28 23:44:01.452 1eb8 Facility ???INFO: WrapperHyperV::WrapperHyperV: LoadLibrary C:\Windows\system32\wbem\wmiutils.dll - 7d4d0000
2/28 23:44:06.526 1eb8 Facility ???INFO: ICPPage::OnWizardNext: SetActivePage - eESXConnection
2/28 23:44:24.561 1210 Facility ???INFO: WrapperESXI::connect: m_url - https://192.168.0.10/sdk
2/28 23:44:24.639 1210 Facility ???INFO: WrapperESXI::connect: fullName - Administrator, key - 52d4ff2d-56cc-3b8e-df94-2e7c528036b7
2/28 23:44:24.639 a2c Facility ???INFO: VMConverter::ESXIConverter::Connection::<lambda_45e10b95ea75dd0c0340da46e5ffb3a1>::operator (): Worker thread started.
2/28 23:44:24.639 1210 Facility ???INFO: VMConverter::ESXIConverter::Connection: No_timeout ESX connection
2/28 23:44:24.639 1eb8 Facility ???INFO: ICPPage::OnWizardNext: SetActivePage - eInputVM
2/28 23:44:24.749 1eb8 Facility ???INFO: VMConverter::ESXIConverter::GetHostListInfo: ESX version: 7.0.3
2/28 23:44:26.304 1eb8 Facility ???ERROR: CPPInputVM::onNext: Error select vm or disk
2/28 23:44:30.811 1eb8 Facility ???INFO: ICPPage::OnWizardNext: SetActivePage - eLocationTo
2/28 23:44:34.937 1eb8 Facility ???INFO: ICPPage::OnWizardNext: SetActivePage - eVMSettingsAWS
2/28 23:44:44.189 1efc Facility ???INFO: WrapperHyperV::connect: Host - \\localhost\root\virtualization\v2
2/28 23:44:44.224 1efc Facility ???INFO: WrapperHyperV::init_version: HyperV version: 10.0.20348
2/28 23:44:44.224 1eb8 Facility ???INFO: ICPPage::OnWizardNext: SetActivePage - eSelectFolder
2/28 23:45:20.267 1eb8 Facility ???INFO: ICPPage::OnWizardNext: SetActivePage - eESXConnectionTo
2/28 23:45:20.267 1c0c Facility ???INFO: CPPConverting::Convert: InConvertType: 6, OutConvertType: 8
2/28 23:45:20.267 1c0c Facility ???INFO: CPPConverting::ConvertDisks: pathInput: [SAS] Server/Server.vmdk, pathOutput: V:\Virtual Hard Disks\oldserver\Virtual Hard Disks\Serve.vhd
2/28 23:45:20.305 1c0c Facility ???INFO: ESXVmdk::ParseFile: sFilename - [SAS] Server/Server.vmdk
2/28 23:45:20.305 1c0c Facility ???INFO: ESXVmdk::ParseFile: m_cvmxSpec - moref=1
2/28 23:45:20.330 1c0c Facility ???INFO: ESXVmdk::ParseFile: sslThumbprint - E3:B7:F7:C0:B8:3A:A1:CB:95:2F:E5:DC:9F:28:E8:0E:CF:99:7A:35
2/28 23:45:21.618 1c0c Facility ???INFO: CPPConverting::ConvertDisks: CreateInputImage: 0
2/28 23:45:22.512 1c0c Facility ???ERROR: CVHDXFile::NewFile: File extension is not VHDX.
2/28 23:45:22.512 1c0c Facility ???INFO: CPPConverting::ConvertDisks: CreateOutputImage: 13
2/28 23:45:22.528 1c0c Facility ???ERROR: CPPConverting::Convert: FAILED
2/28 23:49:24.640 a2c Facility ???INFO: VMConverter::ESXIConverter::Connection::<lambda_45e10b95ea75dd0c0340da46e5ffb3a1>::operator (): Timeout ESX connection. Performing updates.
Re: V2V VMware to Hyper-V Failing
Posted: Sat Mar 01, 2025 5:00 am
by yaroslav (staff)
Hi,
Thanks, I will bring them to R&D. Please follow the workaround for converting the individual disks.
Re: V2V VMware to Hyper-V Failing
Posted: Sat Mar 01, 2025 5:07 am
by mcreedjr
This is a regression issue. I have no interest in converting individual disks by hand. 9.0.1.509 functions as expected.

- 2025-03-01 00_05_09-ATC-VMHOST - Mega-Byte Remote Control - Connected.png (39.24 KiB) Viewed 16847 times
Re: V2V VMware to Hyper-V Failing
Posted: Sat Mar 01, 2025 5:15 am
by yaroslav (staff)
Thanks for your update. I can't provide the ETA for the workaround. Please use the previous converter version if it works.
My colleagues will look into the logs. Many thanks for your cooperation!
Re: V2V VMware to Hyper-V Failing
Posted: Sat Mar 01, 2025 7:55 pm
by tommytwotone
Thanks for all the information. Anywhere I can download version9.0.1.509 ?
Re: V2V VMware to Hyper-V Failing
Posted: Sat Mar 01, 2025 8:23 pm
by yaroslav (staff)
Re: V2V VMware to Hyper-V Failing
Posted: Sat Mar 01, 2025 9:33 pm
by tommytwotone
Thanks a lot. VM currently converting. Appreciate the timely response.
Re: V2V VMware to Hyper-V Failing
Posted: Sat Mar 01, 2025 10:05 pm
by yaroslav (staff)
You are always welcome! Thanks for spotting the bug.
Re: V2V VMware to Hyper-V Failing
Posted: Thu Mar 13, 2025 9:47 pm
by yaroslav (staff)
Hi,
Reportedly, the fix is in the latest build. Check it out.
Re: V2V VMware to Hyper-V Failing
Posted: Thu Mar 13, 2025 10:03 pm
by tommytwotone
OK will test it out. Thanks
Re: V2V VMware to Hyper-V Failing
Posted: Fri Mar 14, 2025 5:43 am
by yaroslav (staff)
Please keep me posted.
Re: V2V VMware to Hyper-V Failing
Posted: Fri Mar 14, 2025 11:14 pm
by tommytwotone
Hi, Downloaded the new version and it errored out in a similar manner

- 2025-03-14_19h11_48.png (18.19 KiB) Viewed 11732 times