Cannot save Fig as PNG -- Matlab bug?

I think there's a problem with Matlab. I'm unable to save a figure as png, using the basic command "saveas(gcf, 'test.png')". The figure does exist. The error is at the end of this message. Thoughts?

>> gcf

ans = 

    Figure (2) with properties:

        Number: 2
          Name: ''
         Color: [0.9400 0.9400 0.9400]
      Position: [680 678 560 420]
         Units: 'pixels'

>> ver
  -----------------------------------------------------------------------------------------------------
  MATLAB Version: 9.3.0.713579 (R2017b)
  MATLAB License Number: xxxxxxxxxx
  Operating System: Microsoft Windows 7 Professional  Version 6.1 (Build 7601: Service Pack 1)
  Java Version: Java 1.8.0_121-b13 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
  -----------------------------------------------------------------------------------------------------
  MATLAB                                                Version 9.3         (R2017b)
  Simulink                                              Version 9.0         (R2017b)
  Control System Toolbox                                Version 10.3        (R2017b)
  Curve Fitting Toolbox                                 Version 3.5.6       (R2017b)
  Data Acquisition Toolbox                              Version 3.12        (R2017b)
  Image Processing Toolbox                              Version 10.1        (R2017b)
  MATLAB Coder                                          Version 3.4         (R2017b)
  Optimization Toolbox                                  Version 8.0         (R2017b)
  Signal Processing Toolbox                             Version 7.5         (R2017b)
  Simulink Coder                                        Version 8.13        (R2017b)
  Simulink Control Design                               Version 5.0         (R2017b)
  Simulink Design Optimization                          Version 3.3         (R2017b)
  Simulink Desktop Real-Time                            Version 5.5         (R2017b)
  Stateflow                                             Version 9.0         (R2017b)
  Statistics and Machine Learning Toolbox               Version 11.2        (R2017b)
  Symbolic Math Toolbox                                 Version 8.0         (R2017b)
  System Identification Toolbox                         Version 9.7         (R2017b)

Here is the error:

>> saveas(gcf, 'test.png')
Error using print (line 82)
Invalid MEX-file 'C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64':
Missing symbol 'OpenProcess' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-Synch-L1-1-0.dll' required by
'C:\Windows\system32\KERNEL32.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\VCRUNTIME140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\MSVCP140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwresource_core.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwi18n.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'FileTimeToSystemTime' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-File-L1-1-0.dll' required by
'C:\Windows\system32\KERNEL32.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\VCRUNTIME140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\MSVCP140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwresource_core.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwi18n.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'GetNamedPipeAttribute' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-NamedPipe-L1-1-0.dll' required by
'C:\Windows\system32\KERNEL32.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\VCRUNTIME140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\MSVCP140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwresource_core.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwi18n.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'SystemTimeToTzSpecificLocalTime' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-SysInfo-L1-1-0.dll' required by
'C:\Windows\system32\KERNEL32.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\VCRUNTIME140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\MSVCP140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwresource_core.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwi18n.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'TzSpecificLocalTimeToSystemTime' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-SysInfo-L1-1-0.dll' required by
'C:\Windows\system32\KERNEL32.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\VCRUNTIME140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\MSVCP140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwresource_core.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwi18n.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'GetDynamicTimeZoneInformation' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-SysInfo-L1-1-0.dll' required by
'C:\Windows\system32\KERNEL32.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\VCRUNTIME140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\MSVCP140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwresource_core.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwi18n.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'GetTimeZoneInformationForYear' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-SysInfo-L1-1-0.dll' required by
'C:\Windows\system32\KERNEL32.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\VCRUNTIME140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\MSVCP140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwresource_core.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwi18n.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'SystemTimeToFileTime' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-SysInfo-L1-1-0.dll' required by
'C:\Windows\system32\KERNEL32.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\VCRUNTIME140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\MSVCP140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwresource_core.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwi18n.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'GetTimeZoneInformation' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-SysInfo-L1-1-0.dll' required by
'C:\Windows\system32\KERNEL32.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\VCRUNTIME140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\MSVCP140.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwresource_core.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwi18n.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'FileTimeToSystemTime' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-File-L1-1-0.dll' required by
'C:\Windows\system32\msvcrt.dll->C:\Windows\system32\ADVAPI32.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\boost_filesystem-vc140-mt-1_56.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwi18n.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'GetTimeZoneInformation' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-SysInfo-L1-1-0.dll' required by
'C:\Windows\system32\msvcrt.dll->C:\Windows\system32\ADVAPI32.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\boost_filesystem-vc140-mt-1_56.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwi18n.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'SystemTimeToFileTime' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-SysInfo-L1-1-0.dll' required by
'C:\Windows\system32\msvcrt.dll->C:\Windows\system32\ADVAPI32.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\boost_filesystem-vc140-mt-1_56.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwi18n.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'FileTimeToSystemTime' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-File-L1-1-0.dll' required by
'C:\Windows\system32\RPCRT4.dll->C:\Windows\system32\ADVAPI32.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\boost_filesystem-vc140-mt-1_56.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwi18n.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'OpenProcess' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-Synch-L1-1-0.dll' required by
'C:\Windows\system32\dbghelp.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwfl.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'LoadStringA' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-LibraryLoader-L1-1-0.dll'
required by 'C:\Windows\system32\WS2_32.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\boost_log-vc140-mt-1_56.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwfl.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'LoadStringW' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-LibraryLoader-L1-1-0.dll'
required by 'C:\Windows\system32\WS2_32.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\boost_log-vc140-mt-1_56.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwfl.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'LoadStringW' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-LibraryLoader-L1-1-0.dll'
required by
'C:\Windows\system32\ole32.dll->C:\Windows\system32\OLEAUT32.dll->C:\Windows\system32\SETUPAPI.dll->C:\Windows\system32\POWRPROF.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwfl.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'OpenProcess' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-Synch-L1-1-0.dll' required by
'C:\Windows\system32\ole32.dll->C:\Windows\system32\OLEAUT32.dll->C:\Windows\system32\SETUPAPI.dll->C:\Windows\system32\POWRPROF.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwfl.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'
Missing symbol 'SystemTimeToFileTime' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-SysInfo-L1-1-0.dll' required by
'C:\Windows\system32\ole32.dll->C:\Windows\system32\OLEAUT32.dll->C:\Windows\system32\SETUPAPI.dll->C:\Windows\system32\POWRPROF.dll->C:\Program
Files\MATLAB\R2017b/bin/win64\libmwfl.dll->C:\Program
Files\MATLAB\R2017b\toolbox\matlab\imagesci\private\pngwritec.mexw64'.

Error in saveas (line 181)
        print( h, name, ['-d' dev{i}] )

[Image Analyst]

Can you save it by using the little disk icon on the figure's toolbar?

[Jan]

 Missing symbol 'OpenProcess' in 'C:\Program
Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-Synch-L1-1-0.dll'

This seems to be serious: Several functions of the Windows KERNEL32 library are not found. Did it run before you have modified anything?

While the slashes are okay as file separator under Windows, I actually expect backslashes around the "bin" folder.

[Stephen23]

John's "Answer" moved here:

Update: I am able to save as jpg using the above command. However, as stated, png throws the error

Jan, yes, everything else seems to run fine.

[yannick]

Did you find a solution to that error? I get the exact same error message:

   Missing symbol 'OpenProcess' in 'C:\Program
  Files\MATLAB\R2017b/bin/win64\API-MS-Win-Core-Synch-L1-1-0.dll'

My program used to run until one hour ago and I did not change anything that I would know of...

Answer 1

[John]

Again, PNG does not work. Anyone have further thoughts?

[Walter Roberson]

I would recommend contacting Mathworks support.