I am receiving this error when attempting to P2V a physical Windows 2012 server into vcenter 7.0u3c using VMware Converter Standalone 6.3 build: 205753454. The physical computer is a workgroup member so i added host file entries for both the venter server and the target esxi host.
here is a snippet of the log file with ip addresses and user creds redacted
2023-04-04T12:22:33.759-07:00 info converter-gui[09308] [Originator@6876 sub=wizardController] FillPageContents(): currentPage is 7
2023-04-04T12:22:33.759-07:00 info converter-gui[09308] [Originator@6876 sub=wizardController] FillPageContents(): currentPage is 8
2023-04-04T12:22:33.759-07:00 info converter-gui[09308] [Originator@6876 sub=wizardController] subpages = 1
2023-04-04T12:22:33.759-07:00 verbose converter-gui[09308] [Originator@6876 sub=wizardController] Found data connection TaskSummaryDataConnection
2023-04-04T12:22:33.759-07:00 verbose converter-gui[09308] [Originator@6876 sub=Default] Getting VIM connection to xxx.xxx.xxx.xxx...
2023-04-04T12:22:33.759-07:00 info converter-gui[09308] [Originator@6876 sub=Default] Connecting to host xxx.xxx.xxx.xxx on port 443
2023-04-04T12:22:33.759-07:00 info converter-gui[09308] [Originator@6876 sub=Default] localVersion is: vim.version.version10
2023-04-04T12:22:33.775-07:00 info converter-gui[09308] [Originator@6876 sub=Default] Remote version is: unrecognized
2023-04-04T12:22:33.775-07:00 verbose converter-gui[09308] [Originator@6876 sub=Default] [VimApi] Remote version not found. Assuming it's a newer version so try using local version vim.version.version10
2023-04-04T12:22:33.790-07:00 info converter-gui[09308] [Originator@6876 sub=Default] Authenticating user xxx\xxxxx
2023-04-04T12:22:33.790-07:00 verbose converter-gui[09308] [Originator@6876 sub=HttpConnectionPool-000013] HttpConnectionPoolImpl created. maxPoolConnections = 1; idleTimeout = 900000000; maxOpenConnections = 1; maxConnectionAge = 0
2023-04-04T12:22:33.900-07:00 verbose converter-gui[09308] [Originator@6876 sub=Default] VimConnectionStore stopping keepalive
2023-04-04T12:22:33.900-07:00 info converter-gui[09308] [Originator@6876 sub=Default] Scheduled timer canceled, StopKeepAlive succeeds
2023-04-04T12:22:33.900-07:00 verbose converter-gui[09308] [Originator@6876 sub=vmomi.soapStub[12]] Resetting stub adapter for server <cs p:0e04f878, TCP:xxx.xxx.xxx.xxx:443> : Closed
2023-04-04T12:22:33.900-07:00 info converter-gui[09308] [Originator@6876 sub=wizardController] FillPage()
2023-04-04T12:22:58.214-07:00 error converter-gui[09308] [Originator@6876 sub=wizardController] Unable to submit job: converter.fault.FileIOFault
2023-04-04T12:22:58.214-07:00 error converter-gui[09628] [Originator@6876 sub=ConversionState] Submit job failed: A file I/O error occurred while accessing ''.
2023-04-04T12:22:58.214-07:00 error converter-gui[09628] [Originator@6876 sub=ConverterWizardWindow] Next/Finish failed: A file I/O error occurred while accessing ''.
2023-04-04T12:23:08.762-07:00 info converter-gui[09628] [Originator@6876 sub=ConverterSession] Converter data provider created.
2023-04-04T12:23:08.762-07:00 info converter-gui[09628] [Originator@6876 sub=DiagnosticDataProvider] Converter::Client::Gui::Common::DiagnosticDataProvider::DownloadSourceDiagnosticFile - Using last known source computer spec: