DumpMaster seems to work on Linux but not on Windows 10

[hojo181]

Hi, I have tested the Dumpmaster with a datasette only so I can't tell about the 1541 side because I don't have one. Under Linux I have got it working creating a tape, I had to fix the permission for the user about the com port, the tap file I have made work withou problem with Vice under Linux, but the same combination of tape and reader seems to not work under Windows 10. The first issue I had to fix was to change the com port number from 3 to 24 otherways the python script complain about the com already in use even if I can't find a program using that com when I use DumpMaster. The problem is that when I create a tap file I get the following error:
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Users\loren\AppData\Local\Programs\Python\Python38\lib\tkinter_init_.py", line 1883, in call
return self.func(*args)
File "dumpmaster-gui.py", line 916, in tapeRead
checksum += data[1]
IndexError: index out of range

How I can fix that?

Regards