Unable to read from 'subprocess' pipe when using base64 blob

[Cx01N]

Hey guys. Appreciate the work you have done with this and RunOF and we are trying to get RunPE integrated into Empire next.
I ran into a strange issue both locally and through the C2 where it reports back that [-] Unable to read from 'subprocess' pipe. This error happens when I run Mimikatz locally with the file directly, which also seems strange. I tested a few examples: CheekyBlinders.exe (with the updates from #11), Mimikatz, and ATPMiniDump.exe.

This is what it looks like if I pass in our Task function, which is using Covenant's Roslyn compiler with a modified version of your project (needed public functions).

    using System;
    using System.IO;
    using System.Linq;
    using System.Reflection;
    using RunPE;
    
    public static class Task
    {
        public static Stream OutputStream { get; set; }
        public static string Execute(string Command = "")
        {
            TextWriter realStdOut = Console.Out;
            TextWriter realStdErr = Console.Error;
            StreamWriter stdOutWriter = new StreamWriter(OutputStream);
            StreamWriter stdErrWriter = new StreamWriter(OutputStream);
            stdOutWriter.AutoFlush = true;
            stdErrWriter.AutoFlush = true;
            Console.SetOut(stdOutWriter);
            Console.SetError(stdErrWriter);
            var assembly = Assembly.GetExecutingAssembly();
            var resourceName = "executable.txt";
            string[] names = assembly.GetManifestResourceNames();
            StreamReader reader = new StreamReader(assembly.GetManifestResourceStream(resourceName));
            string executable = reader.ReadToEnd();
            
            string string_args = "---b " + executable + " " + Command;
            string[] args = string_args.Split(' ');
            RunPE.Program.Main(args);
            
            Console.Out.Flush();
            Console.Error.Flush();
            Console.SetOut(realStdOut);
            Console.SetError(realStdErr);
  
            OutputStream.Close();
            return "";
        }
    }

When I run directly through the application, I can get RunPE to work with ATPMiniDump and CheekyBlinder.

And it runs with Mimikatz, but it gives that subprocess pipe error.

I'm sure it's something stupid on my part, so I would greatly appreciate any suggestions.