plot data crashed when change axis max/min value

pfs@shell-ics:~$ Traceback (most recent call last):
File "/software/conda/lib/python3.6/site-packages/matplotlib/backends/qt_editor/formlayout.py", line 456, in apply
self.apply_callback(self.formwidget.get())
File "/software/conda/lib/python3.6/site-packages/matplotlib/backends/qt_editor/figureoptions.py", line 254, in apply_callback
figure.canvas.draw()
File "/software/conda/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py", line 433, in draw
self.figure.draw(self.renderer)
File "/software/mhs/products/Linux64/ics_sps_engineering_plotData/1.1.2/lib/python/sps_engineering_plotData/figure.py", line 18, in draw
self.graph.userCustom()
File "/software/mhs/products/Linux64/ics_sps_engineering_plotData/1.1.2/python/sps_engineering_plotData/graph.py", line 487, in userCustom
curve.updateProp()
File "/software/mhs/products/Linux64/ics_sps_engineering_plotData/1.1.2/python/sps_engineering_plotData/curve.py", line 129, in updateProp
self.yscale = yscale
AttributeError: can't set attribute