@gerazov, please post some code that generates an array for which plotting is not available.

It's really elusive - I took down parts of my code and this is a minimum working example. If you take away anything, e.g. the mse, it starts working.

import numpy as np
import matplotlib.pyplot as plt

def get_mse(target, synth):
    weights = np.sum(target, axis=0)
    mse = None
    return mse, weights

spec = np.random.rand(128, 159)
mse, energy_mel = get_mse(spec, spec)
mse, energy_spec = get_mse(spec, spec)

If you run this then energy_spec cannot be plotted from the Variable Explorer.

This persists IPython Console restarts, and restarting Spyder. See if you can confirm.

@dalthviz, can you reproduce this one with @gerazov example above?

@ccordoba12 yep I can reproduce this, no plot action in shown in the context menu of the Variable Explorer

Ok thanks!