Error LNK201 in MEX compilation

Hi everyboy,

I am trying to compile a Fortran code (f90) using "MEX" command.

• This is my MATLAB version: R2012b;
• This is my compiler: Intel Visual Fortran 12 (with Microsoft Software Development Kit (SDK) linker);

and (unfortunately) this is the only result I've obtained:

Creating library C:\Users\Paolo\AppData\Local\Temp\mex_a9T3Xq\templib.x and object C:\Users\Paolo\AppData\Local\Temp\mex_a9T3Xq\templib.exp 
refpropm_PC.obj : error LNK2019: unresolved external symbol MXISSTRING referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol SETUP referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol WMOL referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol XMOLE referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol PHFLSH referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol TPFLSH referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol PDFLSH referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol DHFLSH referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol TDFLSH referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol THFLSH referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol HSFLSH referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol DSFLSH referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol PSFLSH referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol TSFLSH referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol DEFLSH referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol PEFLSH referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol TEFLSH referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol DQFL2 referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol THERM referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol PQFLSH referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol TQFLSH referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol MXCREATESCALARDOUBLE referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol XMASS referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol TRNPRP referenced in function MEXFUNCTION 
refpropm_PC.obj : error LNK2019: unresolved external symbol SURTEN referenced in function MEXFUNCTION 
refpropm_PC.mexw64 : fatal error LNK1120: 25 unresolved externals

Does anybody know how to fix it?

Thanks in advice!

Paolo Conti

[James Tursa]

You need to include all source code and library files with the mex command. What mex command did you use?

[Kaustubha Govind]

Paolo: When you post an answer and "accept" it, it indicates that you have found the resolution to your issue. I would recommend that you delete the answer and post your reply to James' question here as a comment.

James is asking where your functions like PQFLSH, XMASS, etc. are defined, and whether you have linked all relevant files/libraries against your MEX-file.

Also, note that mxIsString has been obsoleted and replaced by mxIsChar and mxCreateScalarDouble has been replaced by mxCreateDoubleScalar.

[Paolo Conti]

Thanks Kaustubha for your explanation about the correct use of this forum... I did not know the difference between "comments" and the "answers" (I'm a new user).

I followed your indications and now the compiler works!!

Thanks to both of you for your precious help!!

What should I do now? Create an answer?

[Kaustubha Govind]

Paolo: You simply need to replace mxIsString with mxIsChar and mxCreateScalarDouble with mxCreateDoubleScalar. Check the documentation to make sure the right syntax is used in your code.

[Paolo Conti]

Thank you for your help! Now it works!

What should I do now? Create an answer ?