Invalid MEX-file, likely missing .dll
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In matlab 2012a on win 7 I am trying to install the otherwise very good MySQL Data Connector. However, when trying to run the generated mex-file, I get
Invalid MEX-file {path}: The specified module could not be found.
where {path} is the full path of the .mex64-file. The mex-call looks like this:
mex -I"C:\Program Files\MySQL\MySQL Server 5.6\include" -DWIN32 C:\Users\kaare\Dropbox\matlabTools\mysql.cpp "C:\Program Files\MySQL\MySQL Server 5.6\lib\libmysql.lib"
This returns no errors, and is in line with the instructions in the .cpp-file.
When running "dependency walker" on the faulty mex-file, I find that libmx.dll, libmex.dll and libmysql.dll seem to be missing in action. I assume the first two are included by matlab, and I'm not sure what the problem is with the last, since libmysql.dll is exactly in the position specified.
Has anyone got any suggestions about what might be failing?
I have no found contact information on the original author, who seems largely to have abandoned the function. Is anyone familiar with a good alternative for accessing a mySQL server from within matlab?
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回答 (4 件)
Kaustubha Govind
2014 年 6 月 19 日
Could you please explain this statement: "libmysql.dll is exactly in the position specified" - how do you specify this path? Typically the path to DLLs need to be added to the System PATH environment variable to be picked up at runtime. You may need to restart MATLAB after changing the System variable, so that the change gets picked up. Alternately, you can use the MATLAB setenv command to set the variable for that session.
If you ran Dependency Walker outside of MATLAB, it could just be that libmx.dll and libmex.dll are not on the System PATH, but should be resolved by MATLAB. So that could just be noise that you can ignore.
Ken Atwell
2014 年 6 月 20 日
Try running Dependency Walker from inside MATLAB:
>> !\path\to\depends.exe
This will give you MATLAB's "view" of your system (and libmx.dll et al will almost certainly be seen). I suspect the MySQL .DLL is not on the system path inside of MATLAB. In this case, you may need to fiddle with your path -- see setenv.
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Rasa Karapandza
2017 年 2 月 26 日
Hi I have a similar problem. Mex works fin within mailable, but when compiled, throws the sam error. But dependencywalker dođeš not reveal much. Any help would be appreciated.
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