winscp.com with c# and put command

/// Run hidden WinSCP process
Process winscp = new Process();
winscp.StartInfo.FileName = "winscp.com";


winscp.StartInfo.Arguments = "/log=" + logname;
winscp.StartInfo.UseShellExecute = false;
winscp.StartInfo.RedirectStandardInput = true;
winscp.StartInfo.RedirectStandardOutput = true;
//winscp.StartInfo.FileName = "test_daimler.vdi";

winscp.StartInfo.CreateNoWindow = true;
winscp.Start();

/// Feed in the scripting commands
winscp.StandardInput.WriteLine("option batch on");
winscp.StandardInput.WriteLine("option confirm off");
winscp.StandardInput.WriteLine("open mysession");
winscp.StandardInput.WriteLine("ls");
winscp.StandardInput.WriteLine("RM *.vdi*");
winscp.StandardInput.WriteLine("ls");

winscp.StandardInput.WriteLine("put c:\\test_daimler_1.vdi ");
//winscp.StandardInput.WriteLine("get *.*");
winscp.StandardInput.WriteLine("ls");
winscp.StandardInput.Close();

/// Collect all output (not used in this example)
string output = winscp.StandardOutput.ReadToEnd();

Console.WriteLine("output:" + output);


when I run the above script, the file names get put on the server as
%SFLNDSFTPT%SFLNDSFTPT%null%DONE%test_daimler1.vdi_0bte0l005q8e34fp00004srm

I can't seem to control the file name. How do I get rid of
%SFLNDSFTPT%SFLNDSFTPT%null%DONE%

Any and all help would be greatly appreciated.

Crosspost.