Good afternoon group,
I am developing an application that had always before plotted a variable 2D
numpy array of floats using contourf(), and then saved the figure produced as
.png. Certain runs of the application (the ones with best precision) result in
a failure while saving the figure using savefig(), and as consequence the
message says at the end: "Runtime Error: Failure to gain raw access to bitmap
data", here is the complete complaint, does someone know what is happening
please?
I use windows machines and Python 2.5.4.
Traceback (most recent call last):
File
"C:/OSGeo4W/apps/Python25/Scripts/Jan_7_2010/SOMangelCalculationClassesOption2NoComparison.py"
, line 667 in CalculateCG:
savefig(fname, dpi=600, facecolor='w', edgecolor='w',
orientation='portrait', papertype=None, format=None, transparent=False)
File "C:/OSGeo4W/apps/Python25/Lib/site-packages/matplotlib/pyplot.py", line
269, in savefig
return fig.savefig(*args, **kwargs)
File "C:/OSGeo4W/apps/Python25/Lib/site-packages/matplotlib/figure.py", line
782, in savefig
self.canvas.print_figure(*args, **kwargs)
File
"C:/OSGeo4W/apps/Python25/Lib/site-packages/matplotlib/backends/backend_wxagg.py",
line 101, in print_figure
FigureCanvasAgg.print_figure(self, filename, *args, **kwargs)
File "C:/OSGeo4W/apps/Python25/Lib/site-packages/matplotlib/backend_bases.py",
line 1195, in print_figure
**kwargs)
File
"C:/OSGeo4W/apps/Python25/Lib/site-packages/matplotlib/backends/backend_agg.py"),
line 396, in print_png
self.draw()
File
"C:/OSGeo4W/apps/Python25/Lib/site-packages/matplotlib/backends/backend_wxagg.py",
line 63, in draw
self.bitmap = _convert_agg_to_wx_bitmap(self.get_renderer(), None)
File
"C:/OSGeo4W/apps/Python25/Lib/site-packages/matplotlib/backends/backend_wxagg.py",
line 226, in _py_WX28_convert_agg_to_wx_bitmap
agg.buffer_rgba(0,0))
File
"C:/OSGeo4W/apps/Python25/Lib/site-packages/wx-2.8-msw-unicode\wx\_gdi.py",
line 889, in BitmapFromBufferRGBA
return _gdi_._BitmapFromBufferRGBA(width, height, dataBuffer)
RuntimeError: Failed to gain raw access to bitmap data.
M. Angelica Echavarria-Gregory, M.Sc., E.I.
Ph.D Candidate
University of Miami
Phone 305 284-3611
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