Script using pdfplumber transfered into exe using pyinstaller can not recognize PDF

[Junjie-Fan]

Hi,maintaners:
Thanks for publishing so useful libs. I have a question that when I turn my script into exe format using pyinstaller and run the exe, it shows that
pdfminer.pdfparser.PDFSyntaxError: No /Root object! - Is this really a PDF?
By the way I use the commond
pyinstaller.exe -F mypython_script.py to transfer the python script into exe and use the function
pdfplumber.open(file_name) to open the PDF file.
It works successfully when I just use the python script. Is there are some mistakes in my process?
Looking for somebody to help me out!