ImportError: DLL load failed while importing _arpack

Question

I'm new here. I use spyder in anaconda. Some days ago I was running a simple calculation of a system of ordinary differential equations, just like I've used to do since I learned to use python. For that and other purposes, I use scipy A LOT, particularly scipy.optimize and scipy.integrate are the ones I use the most, but when I ran that code, I got the error:

ImportError: DLL load failed while importing _arpack: No se encontró el proceso especificado.

I checked every single line, and I realized it was the line:

from scipy.integrate import odeint

that didn't work. But it was only "scipy.anything", because scipy alone can be imported without any error. I googled some solutions for similar problems, but it hasn't worked for me.

I uninstalled scipy through anaconda, then reinstalled both through anaconda and then through command prompt, but the seconda didn't find any appropriate version to install. Does anyone have any idea what could I do?

For the record, I cracked a program called Aspen Plus v.11 days before the error appeared,so I don't know whether it could have to do something with it. Also, I'm chemical engineering student.