Exchange Upgrade, /PrepareSchema and a cryptic error

The following error was generated when "$error.Clear(); install-ExchangeSchema -LdapFileName ($roleInstallPath + "Setup\Data\"+$RoleSchemaPrefix + "schema0.ldf")" was run: "The system could not find the file specific".
[08/11/2014 02:59:42.0175] [1] Executing: 
install-ExchangeSchema -LdapFileName ($roleInstallPath + "Setup\Data\"+$RoleSchemaPrefix + "schema0.ldf")
[08/11/2014 02:59:42.0175] [2] Active Directory session settings for 'Install-ExchangeSchema' are: View Entire Forest: 'True', Configuration Domain Controller: 'DC-01.extest.com', Preferred Global Catalog: 'DC-01.extest.com', Preferred Domain Controllers: '{ DC-01.extest.com }'
[08/11/2014 02:59:42.0175] [2] Beginning processing install-ExchangeSchema -LdapFileName:'Setup\Data\PostWindows2003_schema0.ldf'
[08/11/2014 02:59:42.0175] [2] Running <C:\Windows\system32\ldifde.exe> with arguments <-i -s "DC-01.extest.com" -f "C:\Windows\Temp\ExchangeSetup\Setup\Data\PostWindows2003_schema0.ldf" -j "C:\Users\administrator.EXTEST\AppData\Local\Temp\1" -c "<SchemaContainerDN>" "CN=Schema,CN=Configuration,DC=extest,DC=com">.
[08/11/2014 02:59:42.0175] [2] [WARNING] An unexpected error has occurred and a Watson dump is being generated: The system cannot find the file specified
[08/11/2014 02:59:42.0175] [2] [ERROR] The system cannot find the file specified
[08/11/2014 02:58:43.0366] [1] The following 1 error(s) occurred during task execution:
[08/11/2014 02:58:43.0366] [1] 0. ErrorRecord: The system cannot find the file specified
[08/11/2014 02:58:43.0366] [1] 0. ErrorRecord: System.ComponentModel.Win32Exception: The system cannot find the file specified
at System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo)
at System.Diagnostics.Process.Start(ProcessStartInfo startInfo)
at Microsoft.Exchange.Management.Deployment.InstallExchangeSchema.RunProcess(String fileName, String arguments, WriteVerboseDelegate writeVerbose)
at Microsoft.Exchange.Management.Deployment.InstallExchangeSchema.ImportSchemaFile(String schemaMasterServer, String schemaFilePath, String macroName, String macroValue, WriteVerboseDelegate writeVerbose)
at Microsoft.Exchange.Management.Deployment.InstallExchangeSchema.InternalProcessRecord()
at Microsoft.Exchange.Configuration.Tasks.Task.ProcessRecord()

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