Structure function failing

Hey,

Sometimes the structure function fails, with the below error. Not quite sure if/how to fix it but wondered if otherwise it could just be optional to fit the structure function or something?

Thanks

usr/local/lib/python3.8/dist-packages/losoto/operations/structure.py:125: RuntimeWarning: divide by zero encountered in log10 par = np.linalg.lstsq( A.T, np.log10(variance[myselect][~mask]) )[0] /usr/local/lib/python3.8/dist-packages/losoto/operations/structure.py:125: FutureWarning: rcond parameter will change to the default of machine precision times max(M, N) where M a nd N are the input matrix dimensions. To use the future default and silence this warning we advise to pass rcond=None, to keep using the old, explicitly pass rcond=-1. par = np.linalg.lstsq( A.T, np.log10(variance[myselect][~mask]) )[0] /usr/local/lib/python3.8/dist-packages/losoto/operations/structure.py:165: UserWarning: Attempted to set non-positive bottom ylim on a log-scaled axis. Invalid limit will be ignored. ax.set_ylim(ymin,ymax) /usr/local/lib/python3.8/dist-packages/losoto/operations/structure.py:166: RuntimeWarning: divide by zero encountered in log10 ax1.set_ylim(np.log10(ymin),np.log10(ymax)) Traceback (most recent call last): File "/usr/local/bin/losoto", line 154, in returncode += ops[ op ]._run_parser( soltab, parser, step ) File "/usr/local/lib/python3.8/dist-packages/losoto/operations/structure.py", line 16, in _run_parser return run(soltab, doUnwrap, refAnt, plotName, ndiv) File "/usr/local/lib/python3.8/dist-packages/losoto/operations/structure.py", line 166, in run ax1.set_ylim(np.log10(ymin),np.log10(ymax)) File "/usr/local/lib/python3.8/dist-packages/matplotlib/axes/_base.py", line 4027, in set_ylim bottom = self._validate_converted_limits(bottom, self.convert_yunits) File "/usr/local/lib/python3.8/dist-packages/matplotlib/axes/_base.py", line 3614, in _validate_converted_limits raise ValueError("Axis limits cannot be NaN or Inf") ValueError: Axis limits cannot be NaN or Inf