ProcessStartInfo returning The directory name is invalid when invoking from SQL Job


I have a SQL Job that's running on a DB Server and on one of the steps it calls an application server to run an exe "cmd Exec step type"

the exe application "C#" is invoked properly and does all its intended tasks, as a final step it runs cmd.exe to merge couple of files.

** When running the exe application manually, it's working as intended, but when invoking through SQL Job it's returning the below error:

Error in MergeFiles() Method : System.ComponentModel.Win32Exception (0x80004005): The directory name is invalid
   at System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo)
   at System.Diagnostics.Process.Start()
   at System.Diagnostics.Process.Start(ProcessStartInfo startInfo)
   at _700CreditBillingScheduler.Billing700C.MergeFilesInPath()

Worth saying everything is running on E:\ drive

Here is my code:

    string filePath = "E:\\HomeFolder\\ApplicationFolder"; // where merged file will be created
    string sourcePath = "E:\\HomeFolder\\ApplicationFolder\\Transaction.Indiv.Files\\*.csv"; // to be merged
    string commandLine = String.Format("/c copy /b {0} {1}", sourcePath, "mergedFileName");
    var cmd = new ProcessStartInfo("cmd.exe", commandLine);
    cmd.WorkingDirectory = filePath;
    cmd.UseShellExecute = false;
asked on Stack Overflow Aug 19, 2020 by Marwah Abdelaal • edited Aug 19, 2020 by Marwah Abdelaal

2 Answers


Try to remove the line where you specify the working dir ?

answered on Stack Overflow Aug 19, 2020 by Romka

I found the issue, it has to do with the UNC path. The command was trying to merge the files on DB Server using the UNC path of the file, and UNC isn't supported through cmd.exe, so instead it ran on DB Server where the directory doesn't exist.

I switched to merge the files on application server using the C# application itself.

answered on Stack Overflow Aug 21, 2020 by Marwah Abdelaal

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