[Python] How to debug the "FileNotFoundError: [WinError 2] The system cannot find the file...

Before running the program,I had to run this code in the terminal as shown below:

(venv) C:\Users\user pc\PycharmProjects\testProj>pip install -U pip --user
Requirement already up-to-date: pip in c:\users\user pc\pycharmprojects\testproj\venv\lib\site-packages (19.0.3)

(venv) C:\Users\user pc\PycharmProjects\testProj>pip install psycopg2 --user
Requirement already satisfied: psycopg2 in c:\users\user pc\pycharmprojects\testproj\venv\lib\site-packages (2.7.7)


So, the pip got installed. Only after running this, I have to run my program, in which the following error is occuring:

"C:\Users\user pc\PycharmProjects\testProj\venv\Scripts\python.exe" "C:/Users/user pc/PycharmProjects/testProj/auto.py"
The unique id is 1
Traceback (most recent call last):
File "C:/Users/user pc/PycharmProjects/testProj/auto.py", line 381, in <module>
p = subprocess.Popen(["dscsm047.exe"], stdout=subprocess.PIPE, stdin=subprocess.PIPE)
File "C:\Users\user pc\AppData\Local\Programs\Python\Python37-32\lib\subprocess.py", line 775, in __init__
restore_signals, start_new_session)
File "C:\Users\user pc\AppData\Local\Programs\Python\Python37-32\lib\subprocess.py", line 1178, in _execute_child
startupinfo)
FileNotFoundError: [WinError 2] The system cannot find the file specified

Process finished with exit code 1


Could you please be more clear and specific about the process to debug this error as I am very new to this programming field.

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