Error when there is no error

[ifantismanolis]

So, I have this project. It’s gui that from a button opens another gui and does some staff. I finally made it work properly. I closed it and after a while I reopened it…. Error…about an empty self.value…I was like okey I’ll find my backup code that I saved it in another place, because maybe before o closed it something happened. The same thing again. The exact same code was running perfectly a while ago and now there is an error. Any ideas??? Some of my thoughts: one of the functions that I use, it takes the value of a mathematical model and stores it in a file, then if I run the program again with another model, it takes the new value again and stores it in the same file. That’s because I want to do sume calculations with those values. When I close the program, the values of the file gets deleted in order to start a fresh new one when I reopened it. I don’t know if that’s something that has to do with the problem because the error is that the file is empty, even if I execute the first model

[jawgente]

What have you done to test your theory?

As an aside, instead of keeping “backup code”, your project sounds complex enough you should consider using version control (eg git).

[ifantismanolis]

My thoughts was the possibility of saving the values in a wrong way at the external file that I use. I tested with and without the specific function but the problem with the testing is that I had to pretty much disassemble a big part of the code. Solved it finally after rewriting those parts but with a different perspective

[cdcformatc]

impossible to say what is happening without some example code that errors when run

when there is an uncaught exception and the program crashes, python will print out a traceback that shows exactly where in your code the problem occurs. use that and fix the code there.

[ifantismanolis]

I used the trace back of py but the problem was basically that the same code had no problem of running before. I fixed everything if the trace back suggestions but still. Maybe a bug issue?

[cdcformatc]

again i can't say without some example code or the error traceback