Program crashes on startup

[jdshewey]

With Python 3 and wxpython 4, the program crashes on startup with the error:

raceback (most recent call last):
File "/home/admin/pymapper/./pymapper.py", line 13438, in OnInit
self.init_frame()
File "/home/admin/pymapper/./pymapper.py", line 13674, in init_frame
self.LoadMarkerFiles()
File "/home/admin/pymapper/./pymapper.py", line 15075, in LoadMarkerFiles
bitmap = self.UpdateMarkerImage(marker)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/admin/pymapper/./pymapper.py", line 15179, in UpdateMarkerImage
bitmap_mask = wx.Mask(wx.Bitmap(bitmapPath, wx.BITMAP_TYPE_PNG))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
wx._core.wxAssertionError: C++ assertion ""bitmap.GetDepth() == 1"" failed at ../src/gtk/bitmap.cpp(258) in InitFromMonoBitmap(): Cannot create mask from colour bitmap
OnInit returned false, exiting...

[jdshewey]

Tried re-saving the image in monochrome format, but this did not work.

[jdshewey]

Was able to add wx.BLACK as a parameter to the mask function and this seems to clear it up.