engwindemo.exe - Entry Point Not Found

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Gary
Gary 2017-12-10
评论： Gary 2019-12-17
I want to use MATLAB as a COM server, so I was testing the COM interface using engwindemo.c as described in https://www.mathworks.com/matlabcentral/answers/164250-how-can-i-compile-a-matlab-engine-application-using-microsoft-visual-studio-2012
Whilst there are a couple of other compile parameters required if creating engwindemo.exe using Visual Studio 2013 and above, once I compiled engwindemo.exe and ran it, the MATLAB Command Window opens and then I get the following error message:
"The procedure entry point could not be located in the dynamic link library
C:\Program Files\MATLAB\R2017b\bin\win64\libmwms.dll"
(See attached screenshot 2017-12-10 MATLAB engwindemo.exe error).
When I click "OK" to that error message I get a second error message:
"Can't start MATLAB engine"
(see attached screenshot 2017-12-10 engwindemo.exe error (2)).
The error would appear to originate in the "engOpen" command in engwindemo.exe:
/*
* Start the MATLAB engine
*/
if (!(ep = engOpen(NULL))) {
MessageBox((HWND)NULL, (LPSTR)"Can't start MATLAB engine",
(LPSTR) "Engwindemo.c", MB_OK);
exit(-1);
}
I've tried creating engwindemo.exe in Visual Studio 2013, 2015 & 2017, each time I get the same result.
Here is the compilation configuration:
Any help would be greatly appreciated.
Thank you in advance.
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Walter Roberson
Walter Roberson 2018-1-3
To check: is it possible that you are trying to use the engine from a 32 bit executable?
Gary
Gary 2018-1-3
编辑：Gary 2018-1-4
Hi Walter
Good question ...
I checked the VS2013 Configuration Manager and all configurations are x64, (as per the compilation configuration spec above).
(C:\Users\garymarshall\Documents\Visual Studio 2013\Projects\engwindemo\x64\Debug\engwindemo.exe)
Regards Gary

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回答（1 个）

kuan jiang
kuan jiang 2019-12-17
I also have the same question ,did you figure it out ?
  1 个评论
Gary
Gary 2019-12-17
Kuan,
I reported the problem to Mathworks Technical Support, on 8-Jan-2018 (case #02909721 regarding 'Can't start MATLAB engine') and after a short email exchange with Support agent Zhi Dou, we ended up having a Remote Support Session, which ultimately resolved the issue.
Unfortunately, I did not documentation the solution.
It is almost 2 years ago, and I don't remember the details, (plus I've upgraded regularly since then and never experienced the problem again). So other than suggesting that you contact Technical Support quoting the case reference number above, I'm afraid I can't help you.
I will say, I found the Technical Support Department excellent. They were very responsive, highly knowlegable and solved the problem very quickly. Kudos to them, so I have no hesitation recommending that you use them.
Regards
Gary

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