Integer overflow when attempting to use on any CNF file

[Lilian-Parey]

Greetings, using python 3.11.4, this message appears:

F:\TPM1\c2\tp gamma\CNF>python read_cnf.py eu.CNF

Traceback (most recent call last):
  File "F:\TPM1\c2\tp gamma\CNF\read_cnf.py", line 444, in <module>
    c = read_cnf_file(filename, 'TRUE')
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "F:\TPM1\c2\tp gamma\CNF\read_cnf.py", line 135, in read_cnf_file
    read_dic.update(get_channel_data(f, offs_param, offs_chan))
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "F:\TPM1\c2\tp gamma\CNF\read_cnf.py", line 299, in get_channel_data
    n_channels = uint8_at(f, offs_param + 0x00ba) * 256
                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
OverflowError: Python integer 256 out of bounds for uint8

Beside my own errors I reckon this could either be caused by changes in the file format in the genie 2000 version I had access to or due to a python version more recent than the one this project was developed in
Kind regards

[pbellino]

Hello Lilian,

Thank you for reporting this issue and providing the detailed error traceback.

I'm currently using Python 3.12, so that shouldn't be the cause of this particular error.

The CNF file structure might be different from what the parser expects. I've tested this code with Genie 2000 versions 3.1 and 3.4, but it's possible that newer versions have introduced changes to the file format, as you suggest.

To help investigate this further, could you please let me know wich version of Genie are you using? Would you be able to share the CNF file that's causing this issue?

Best regards.

[ZackSilman]

I had the same error, I fixed it by changing line 300 and adding int() as follows:

n_channels = int(uint8_at(f, offs_param + 0x00ba)) * 256

Shouldn't affect the data, the problem was something to do with the newer NumPy versions.

[pbellino]

Thank you ZackSilman. Which numpy version are your using? I haven't been able to reproduce that bug yet.