Find the log

, anyone know what "Log header signature is fail" is ?
4/7 4:52:10.407 1360 Facility ???INFO: CPPConverting::Convert: InConvertType: 7, OutConvertType: 5
4/7 4:52:10.407 1360 Facility ???INFO: CPPConverting::ConvertImage: pathInput: D:\Hyper-V\VHDX\MyW10.vhdx, pathOutput: [datastore2] MyW10.vmdk
4/7 4:52:10.423 1360 Facility ???INFO: CVHDXFile::getCurrentHeader: Read header 1.
4/7 4:52:10.423 1360 Facility ???INFO: CVHDXFile::getCurrentHeader: Read header 2.
4/7 4:52:10.423 1360 Facility ???INFO: CVHDXFile::getCurrentHeader: Check correct header 1.
4/7 4:52:10.423 1360 Facility ???INFO: CVHDXFile::getCurrentHeader: Check correct header 2.
4/7 4:52:10.438 1360 Facility ???ERROR: CVHDXFile::ParseFile: Log header signature is fail - 1635017060.
4/7 4:52:10.438 1360 Facility ???INFO: CPPConverting::ConvertImage: CreateInputImage: 2
4/7 4:52:10.445 1360 Facility ???INFO: WrapperHyperV::connect: Host - \\10.0.1.18\root\virtualization\v2
4/7 4:52:10.486 1360 Facility ???INFO: WrapperHyperV::init_version: HyperV version: 10.0.20348
4/7 4:52:10.486 1360 Facility ???ERROR: CPPConverting::Convert: FAILED