Ventana software support forum

Hi All
I am using vensim 6.3D(32-bit) and matlab R2015b(64-bit), would like to call vensim from matlab with the command below:

if not(libisloaded('VenDLL32'))
hfile = ['C:\Users\Public\Vensim\dll\vendll.h'];
loadlibrary('VenDLL32',hfile);
end

and get an error:

Warning: Warnings messages were produced while parsing. Check the functions you intend to use for correctness.
Warning text can be viewed using:
[notfound,warnings]=loadlibrary(...)
> In loadlibrary
Error loading library intermediate output follows.
The actual error is at the end of this output.
*********

Type 'HWND' was not found. Defaulting to type error.

Found on line 9 of input from line 112 of file C:\\Users\\Public\\Vensim\\dll\\vendll.h

Type 'HWND' was not found. Defaulting to type error.

Found on line 15 of input from line 118 of file C:\\Users\\Public\\Vensim\\dll\\vendll.h

Type 'HWND' was not found. Defaulting to type error.

Found on line 26 of input from line 129 of file C:\\Users\\Public\\Vensim\\dll\\vendll.h

Type 'HWND' was not found. Defaulting to type error.

Found on line 34 of input from line 137 of file C:\\Users\\Public\\Vensim\\dll\\vendll.h

Type 'HWND' was not found. Defaulting to type error.

Found on line 40 of input from line 143 of file C:\\Users\\Public\\Vensim\\dll\\vendll.h

Type 'HWND' was not found. Defaulting to type error.

Found on line 51 of input from line 154 of file C:\\Users\\Public\\Vensim\\dll\\vendll.h
*********
Error using loadlibrary
Building VenDLL32_thunk_pcwin64 failed. Compiler output is:
C:\MATLAB\SupportPackages\R2015b\MW_MinGW_4_9\\bin\gcc -I"C:\Program Files\MATLAB\Research\R2015b\extern\include"
-fexceptions -fno-omit-frame-pointer -I"C:\Users\S.Mokhtar\Documents\MATLAB" -I"C:\Users\Public\Vensim\dll"
"VenDLL32_thunk_pcwin64.c" -o "VenDLL32_thunk_pcwin64.dll" -shared
In file included from VenDLL32_thunk_pcwin64.c:27:0:
C:\Users\Public\Vensim\dll/vendll.h:112:61: error: unknown type name 'HWND'
CFUNCTION int VEFCC vensim_tool_command(const char *command,HWND pwindow,int aswiptool) ; /* custom.c (not avail
for DLLMIN) */
^
C:\Users\Public\Vensim\dll/vendll.h:118:85: error: unknown type name 'HWND'
CFUNCTION int VEFCC vensim_show_sketch(int sketchnum,int wantscroll,int zoompercent,HWND pwindow) ; /* custom.c
(not avail dllmin) */
^
C:\Users\Public\Vensim\dll/vendll.h:129:46: error: unknown type name 'HWND'
CFUNCTION int VEFCC vensim_set_parent_window(HWND window,long r1,long r2) ;
^
C:\Users\Public\Vensim\dll/vendll.h:137:72: error: unknown type name 'HWND'
CFUNCTION int VEFCC VensimCToolCommand(int context,const char *command,HWND pwindow,int aswiptool) ; /* custom.c
(not avail for DLLMIN) */
^
C:\Users\Public\Vensim\dll/vendll.h:143:96: error: unknown type name 'HWND'
CFUNCTION int VEFCC VensimCShowSketch(int context,int sketchnum,int wantscroll,int zoompercent,HWND pwindow) ; /*
custom.c (int context,not avail dllmin) */
^
C:\Users\Public\Vensim\dll/vendll.h:154:56: error: unknown type name 'HWND'
CFUNCTION int VEFCC VensimCSetParentWindow(int context,HWND window,long r1,long r2) ;
^
VenDLL32_thunk_pcwin64.c: In function 'int32cstringHWNDint32Thunk':
VenDLL32_thunk_pcwin64.c:81:2: error: unknown type name 'HWND'
HWND p1;
^
VenDLL32_thunk_pcwin64.c:85:7: error: 'HWND' undeclared (first use in this function)
p1=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:85:7: note: each undeclared identifier is reported only once for each function it appears
in
VenDLL32_thunk_pcwin64.c:85:12: error: expected ')' before 'const'
p1=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:85:20: error: expected ';' before 'callstack'
p1=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:89:32: error: expected declaration specifiers or '...' before 'HWND'
return ((int32_T (*)(char * , HWND , int32_T ))fcn)(p0 , p1 , p2);
^
VenDLL32_thunk_pcwin64.c:89:49: error: expected ')' before 'fcn'
return ((int32_T (*)(char * , HWND , int32_T ))fcn)(p0 , p1 , p2);
^
VenDLL32_thunk_pcwin64.c: In function 'int32int32int32int32HWNDThunk':
VenDLL32_thunk_pcwin64.c:128:2: error: unknown type name 'HWND'
HWND p3;
^
VenDLL32_thunk_pcwin64.c:135:7: error: 'HWND' undeclared (first use in this function)
p3=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:135:12: error: expected ')' before 'const'
p3=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:135:20: error: expected ';' before 'callstack'
p3=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:137:53: error: expected declaration specifiers or '...' before 'HWND'
return ((int32_T (*)(int32_T , int32_T , int32_T , HWND ))fcn)(p0 , p1 , p2 , p3);
^
VenDLL32_thunk_pcwin64.c:137:60: error: expected ')' before 'fcn'
return ((int32_T (*)(int32_T , int32_T , int32_T , HWND ))fcn)(p0 , p1 , p2 , p3);
^
VenDLL32_thunk_pcwin64.c: In function 'int32HWNDlonglongThunk':
VenDLL32_thunk_pcwin64.c:200:2: error: unknown type name 'HWND'
HWND p0;
^
VenDLL32_thunk_pcwin64.c:203:7: error: 'HWND' undeclared (first use in this function)
p0=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:203:12: error: expected ')' before 'const'
p0=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:203:20: error: expected ';' before 'callstack'
p0=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:209:23: error: expected declaration specifiers or '...' before 'HWND'
return ((int32_T (*)(HWND , long , long ))fcn)(p0 , p1 , p2);
^
VenDLL32_thunk_pcwin64.c:209:44: error: expected ')' before 'fcn'
return ((int32_T (*)(HWND , long , long ))fcn)(p0 , p1 , p2);
^
VenDLL32_thunk_pcwin64.c: In function 'int32int32cstringHWNDint32Thunk':
VenDLL32_thunk_pcwin64.c:304:2: error: unknown type name 'HWND'
HWND p2;
^
VenDLL32_thunk_pcwin64.c:310:7: error: 'HWND' undeclared (first use in this function)
p2=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:310:12: error: expected ')' before 'const'
p2=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:310:20: error: expected ';' before 'callstack'
p2=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:314:42: error: expected declaration specifiers or '...' before 'HWND'
return ((int32_T (*)(int32_T , char * , HWND , int32_T ))fcn)(p0 , p1 , p2 , p3);
^
VenDLL32_thunk_pcwin64.c:314:59: error: expected ')' before 'fcn'
return ((int32_T (*)(int32_T , char * , HWND , int32_T ))fcn)(p0 , p1 , p2 , p3);
^
VenDLL32_thunk_pcwin64.c: In function 'int32int32int32int32int32HWNDThunk':
VenDLL32_thunk_pcwin64.c:369:2: error: unknown type name 'HWND'
HWND p4;
^
VenDLL32_thunk_pcwin64.c:378:7: error: 'HWND' undeclared (first use in this function)
p4=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:378:12: error: expected ')' before 'const'
p4=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:378:20: error: expected ';' before 'callstack'
p4=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:380:63: error: expected declaration specifiers or '...' before 'HWND'
return ((int32_T (*)(int32_T , int32_T , int32_T , int32_T , HWND ))fcn)(p0 , p1 , p2 , p3 , p4);
^
VenDLL32_thunk_pcwin64.c:380:70: error: expected ')' before 'fcn'
return ((int32_T (*)(int32_T , int32_T , int32_T , int32_T , HWND ))fcn)(p0 , p1 , p2 , p3 , p4);
^
VenDLL32_thunk_pcwin64.c: In function 'int32int32HWNDlonglongThunk':
VenDLL32_thunk_pcwin64.c:456:2: error: unknown type name 'HWND'
HWND p1;
^
VenDLL32_thunk_pcwin64.c:461:7: error: 'HWND' undeclared (first use in this function)
p1=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:461:12: error: expected ')' before 'const'
p1=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:461:20: error: expected ';' before 'callstack'
p1=*(HWND const *)callstack;
^
VenDLL32_thunk_pcwin64.c:467:33: error: expected declaration specifiers or '...' before 'HWND'
return ((int32_T (*)(int32_T , HWND , long , long ))fcn)(p0 , p1 , p2 , p3);
^
VenDLL32_thunk_pcwin64.c:467:54: error: expected ')' before 'fcn'
return ((int32_T (*)(int32_T , HWND , long , long ))fcn)(p0 , p1 , p2 , p3);[/b][/i][/i]



could anyone help me with this problem?

Have you tried the Matlab demonstration code that comes with Vensim? Does that work for you?

The sample code is usually at
C:\Users\Public\Vensim\DLL\matlab

Generally you can't call a 32 bit dll from a 64 bit application, unless there's some kind of bridge process. But the HWND error looks like the first issue.

Yes I have tried the code for matlab which comes with vensim, however the first step ( calling vensim dll) is not working.
do you have any idea to have bridge process or getting rid of HWnd error.

Have you tried running the 32 bit version of Matlab?

I replied to your email to us, unfortunately it looks like the email address you used is incorrect (it bounced back saying "The e-mail address you entered couldn't be found. Please check the recipient's e-mail address and try to resend the message. If the problem continues, please contact your helpdesk."

Have you tried the 32 bit version of Matlab?

Hi

What if I upgrade my Vensim to 64 bit? Do you think it would work and can I call the dll from Matlab 64 bit?

Sorry for the e mail address. it sounds my outlook had some issues. I resent the email, could you please reply that.
Thanks
Samira

I'll ask again, have you tried the 32 bit version of Matlab?

Hi
Yes and thanks for your help.
Matlabx32 installed and finally could load vendll32 there.Now I am figuring out how to call my Vensim file and special variables in the model.

Hi

When I use the given code for calling Vensim from Matlab, I don't get any error but the out put is just:
ans =

6


ans =

-6


ans =

-6


ans =

0
0
0
0
...

ans =

0
0
0
0


...

the code I use is:


%% MATLAB to VENSIM by-way-of DDL

% The code below documents a successful example using the Vensim DDL
% from Vensim DSS v6.3 32-bit in conjunction with calls from Matlab
% R2014a 32-bit.
%
% The SD model 'RABFOX.vpm' can be found in the Vensim DSS subdir DLL.
%
% I appreciate the helpful bread crumbs left in Olivia's posts a few
% years ago, and the help troubleshooting the vensim calls this is example
% by the forum administrator (Tony)!
%
% Raymond Smith, North Carolina State University, March 16, 2015

clear all
%*********************LOAD THE MODEL *************************

if not(libisloaded('VenDLL32'))
hfile = ['C:\Users\Public\Vensim\dll\vendll.h'];
loadlibrary('VenDLL32',hfile);
end

% Display Vensim DDL function calls and signatures
libfunctionsview VenDLL32

%% *********************EXECUTE SIMULATION *************************
% check calllib returns to verify initiation

str=['SPECIAL>LOADMODEL|RABFOX.vpm'];
calllib('VenDLL32','vensim_check_status')
calllib('VenDLL32','vensim_command',str)
str=['MENU>RUN|o'];
calllib('VenDLL32','vensim_command',str)


%% *********************RETRIEVE DATA *************************
% retrieve data from the post simulation execution

tnum = 201;
timepts = int32(tnum);

mytime = zeros(1,tnum);
mytimePtr1 = libpointer('singlePtr', mytime);

myrabpop = zeros(1,tnum);
myrabpopPtr1 = libpointer('singlePtr', myrabpop);

% vensim get data command
[int32_status, cstring_vdf, cstring_var1, cstring_var2, singlePtr_var1, ...
singlePtr_var2] = calllib('VenDLL32','vensim_get_data','CURRENT.vdf', ...
'Rabbit Population','time',myrabpopPtr1(1),mytimePtr1(1),timepts);

myrabpopPtr1(1).Value'
mytimePtr1(1).Value'

%% ******************** UNLOAD VENSIM DLL ********************
% unload the library

unloadlibrary VenDLL32

% end of command statements
>>



Could you please let me know how can I interpret the answer?

None of us have Matlab, so there is little we can do to help unfortunately.

I know Hazhir Rahmandad is currently working with Matlab and Vensim if that helps.