Error using saveas (line 179) Unsupported format or extension: png

Hi

I recently upgraded from MATLAB 2017b to 2019b. And now I can't get the saveas function to work. When using the example from the documentation, see below, I get the error that you see in the Question title. Hope you can help me!

x = [2 4 7 2 4 5 2 5 1 4];

bar(x);

saveas(gcf,'Barchart.png')

[Michael]

Addition: It appears that saveas works for .fig and .m format. However, none of the bitmat image file formats nor the vector graphics file formats works.

[Guillaume]

What does

which saveas -all

return?

Actually, since it appears that it's calling the correct saveas (line 179 is where built-in saveas would error), what is the output of:

[~, dev, ext] = printtables(printjob(gcf));

[Michael]

Hi Guillaume

Thanks for you trying to help.

>> which saveas -all

C:\Program Files\MATLAB\R2019b\toolbox\matlab\general\saveas.m

And the output is

>> [~, dev, ext] = printtables(printjob(gcf))

dev =

44×1 cell array

{'win' }

{'winc' }

{'meta' }

{'bitmap' }

{'ps' }

{'psc' }

{'ps2' }

{'ps2c' }

{'psc2' }

{'eps' }

{'epsc' }

{'eps2' }

{'eps2c' }

{'epsc2' }

{'tiff' }

{'tiffnocompression'}

{'bmp' }

{'hdf' }

{'png' }

{'svg' }

{'jpeg' }

{'pcxmono' }

{'pcxgray' }

{'pcx16' }

{'pcx256' }

{'pcx24b' }

{'bmpmono' }

{'bmp16m' }

{'bmp256' }

{'pngmono' }

{'pnggray' }

{'png16m' }

{'png256' }

{'pbm' }

{'pbmraw' }

{'pgm' }

{'pgmraw' }

{'ppm' }

{'ppmraw' }

{'tiffpack' }

{'tiff24nc' }

{'pdfwrite' }

{'prn' }

{'prnc' }

ext =

44×1 cell array

{0×0 char}

{0×0 char}

{'emf' }

{'bmp' }

{'ps' }

{'ps' }

{'ps' }

{'ps' }

{'ps' }

{'eps' }

{'eps' }

{'eps' }

{'eps' }

{'eps' }

{'tif' }

{'tif' }

{'bmp' }

{'hdf' }

{'png' }

{'svg' }

{'jpg' }

{'pcx' }

{'pcx' }

{'pcx' }

{'pcx' }

{'pcx' }

{'bmp' }

{'bmp' }

{'bmp' }

{'png' }

{'png' }

{'png' }

{'png' }

{'pbm' }

{'pbm' }

{'pgm' }

{'pgm' }

{'ppm' }

{'ppm' }

{'tif' }

{'tif' }

{'pdf' }

{0×0 char}

{0×0 char}

Answer 1

[Michael]

Guillaume, your comments made me think of the risk of multiple functions and I found the mistake.

I had a strmatch function in my "custom MATLAB function folder" which I copied from an earlier version of MATLAB because MATLAB said that the function would be removed in a later release.

I removed my strmatch function and the problem is now gone! I would not have thought of this without your input. Thanks very much for your help! :)

[Guillaume]

Yes, as your printtable output, that would have been my next suggestion, that or you're shadowed isempty but that's less likely.