B4J Question jShell doesn't launch external app

    Dim shl As Shell

    shl.Initialize("shl", "C:/Folderwhereisfile/BookTracker.exe", Null)
    shl.Run(-1)
    Log("External App should be running")

   Dim shl As Shell

    shl.Initialize("shl", "D:\TMP\BookTracker\BookTracker.exe", Null)
    shl.WorkingDirectory ="D:\TMP\BookTracker"
    shl.Run(-1)

  Dim shl As Shel;
    shl.Initialize("shl", "D:\TMP\BookTracker\BookTracker.exe", Null)
    shl.Run(-1)
  Wait For shl_ProcessCompleted (Success As Boolean, ExitCode As Int, StdOut As String, StdErr As String)
Log(Success)
 Log(ExitCode)
Log(StdOut)
Lot(StdErr)

    Dim shl As Shell
    shl.Initialize("shl", "cmd", Array("/c", "C:\launcher\launcher.exe"))
    
    shl.Run(-1)
    Wait For shl_ProcessCompleted (Success As Boolean, ExitCode As Int, StdOut As String, StdErr As String)
    Log(Success)
    Log(ExitCode)
    Log(StdOut)
    Log(StdErr)