tkinter按钮无法打开所有批处理文件

Question

我在工作上有一个项目，我们的真正开发者没有时间帮我，所以我正在创建我的第一个图形用户界面（GUI）。

这个界面有两个按钮，点击后会运行一个批处理文件。这个批处理文件会运行一个注册表文件，然后再运行软件的可执行文件。测试的时候一切都很顺利，但我原来的批处理文件只是在输出“Hello World!”这句话……当我把那个批处理文件换成下面的代码时：

start /d "C:\Cogent\cls.chd\" cls.reg

SLEEP 5

start /d "C:\Cogent\cls.chd\bin\" CLSMain.exe

我运行同样的.py文件，却出现了以下错误：

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python33\lib\subprocess.py", line 1112, in _execute_child
    startupinfo)
FileNotFoundError: [WinError 2] The system cannot find the file specified
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "C:\Python33\lib\tkinter\__init__.py", line 1475, in __call__
    return self.func(*args)
  File "C:\Users\A32DZZZ\Desktop\LivescanMonrowFinal.py", line 31, in run1
    process=subprocess.Popen("launch.bat", cwd=r"C:\\Cogent\\cls.chd")
  File "C:\Python33\lib\subprocess.py", line 824, in __init__
    restore_signals, start_new_session)
  File "C:\Python33\lib\subprocess.py", line 1118, in _execute_child
    raise WindowsError(*e.args)
FileNotFoundError: [WinError 2] The system cannot find the file specified"

有没有人能告诉我，我到底哪里没理解清楚？我的图形用户界面如下：

from tkinter import *
import subprocess

master = Tk()
master.title("Monroe Livescan Version Selector")
master.geometry("400x166")

#Menu construction
menubar=Menu(master)
filemenu = Menu(menubar,tearoff = 0)
filemenu.add_command(label="Close")
menubar.add_cascade(label="File",menu=filemenu)

helpmenu = Menu(menubar,tearoff = 0)
helpmenu.add_command(label="Help Docs")
helpmenu.add_command(label="About")
menubar.add_cascade(label="Help",menu=helpmenu)

master.config(menu=menubar)

#Define run function for first Livescan package.
def run1():
    process=subprocess.Popen("launch.bat", cwd=r"C:\\Cogent\\cls.chd")

def run2():
    process=subprocess.Popen("launch.bat", cwd=r"C:\\Cogent\\cls.iafis")

#Define the button geometry and commands to run.    
b1 = Button(master, text='Child ID', command=run1)
b1.pack(padx=5, pady=5)
b1.config(height=4, width=45)
b2 = Button(master, text='IAFIS', command=run2)
b2.pack(padx=5, pady=5)
b2.config(height=4, width=45)


mainloop()

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tkinter按钮无法打开所有批处理文件

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