How to restore file association in Matlab 2015a for Windows
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Andrew Farsech
am 18 Mär. 2015
Beantwortet: Rehan Qasim
am 24 Jun. 2019
The Matlab files are no more associated with Matlab.
In the previous version I have run the Application as Administrator and typed these commands
cwd=pwd;
cd([matlabroot '\toolbox\matlab\winfun\private']);
fileassoc('add',{'.m','.mat','.fig','.p','.mdl',['.' mexext]});
cd(cwd);
disp('Windows file associations changed. FIG, M, MAT, MDL, MEX, and P files are now associated with MATLAB.')
If I try the same in Matlab R2015a doesn't work and give me the error Undefined function or variable 'fileassoc'.
If I try to associate the file type using right click directly on the .m file and choosing open with Matlab with the use always option enabled, the files appears associated but when I try to open the file, Matlab starts but doesn't open the file so I'm forced to start Matlab and open de file from open menu.
How could I fix this problem?
What happened to fileassoc command?
I'm on Windows 8.1 x64
1 Kommentar
Akzeptierte Antwort
Patrik Forssén
am 12 Jun. 2015
I’ve just submitted a contribution to MATLAB FEX that can solve this problem for R2015a (and earlier versions): MATLAB File Association Fix
4 Kommentare
Qian Geng
am 3 Jan. 2018
It works on my 2017b version very well. Long searching for this solution and finally got it. Thx.
Weitere Antworten (5)
Yannis Gr.
am 16 Jun. 2016
Bearbeitet: Yannis Gr.
am 16 Jun. 2016
A bit more help on how you should do this.
2)Extract the file @ C:\Program Files\MATLAB\R2016a\mcr\toolbox\matlab\winfun\private . Change the R2016a according your version of course.
3)Navigate inside matlab to the same dir as above. (Run matlab as admin also)
4)Execute the command associateFiles('add',{'.m','.mat','.fig','.p','.mdl',['.' mexext]});
5)Take the .reg file it will create copy paste on desktop and run it.
8 Kommentare
Cosmin Constantin Popescu
am 21 Mai 2018
It worked by it required to unzip the archive directly in the specified folder (and in a new folder but that was just a default in my case). When I first run the registry file, I had a MATLAB instance open and the .m files opened externally ignored it. Instead, they all opened in a second MATLAB instance. At least that instance now behaves as expected. Thank you for the help and explanations!
Murat Ates
am 20 Mär. 2015
Copying 3 fileassoc files from
C:\Program Files\MATLAB\R2014b\mcr\toolbox\matlab\winfun\private
to the corresponding R2015a folder and running
fileassoc('add',{'.m','.mat','.fig','.p','.mdl',['.' mexext]});
on 2015a in the corresponding folder worked for me. Then you are able to see R2015a in the Windows default programs list i.e.
Control Panel\All Control Panel Items\Default Programs\Set Default Programs
Matlab starter's icon disappeared though. I checked registry of Windows, and command just mirrored whatever is done for 2014b to 2015a.
If you don't have those 3 files, you may export registry settings for Matlab in 2014b, modify and run it if you installed 2014b on that machine. Backup whole registry before doing this. Registry settings are located at:
HKEY_LOCAL_MACHINE\SOFTWARE\MathWorks\R2015a
federica cirillo
am 31 Jan. 2018
Bearbeitet: federica cirillo
am 31 Jan. 2018
it doesn't work for me! I obtain "Failed to create registry file". can you help me? I'm using R2017a version
1 Kommentar
Quentin Guillaumin
am 2 Jul. 2018
I had the same issue, add a path to indicate where to save the registry such as 'C:\Users\bob\Downloads\regisry' in the fileStr entry of the function, I worked for me.
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