Calling fortran f90 in labview

dear frnds..
i have labview 7.0 and a matlab script file.. the matlab file uses the
excel files obtained as output from labview and the processes it and
sends the output back to labview for display.. can any one tell me how
i can accomplish this ??
thanz in advance
karthik

Actually you do not need to have Matlab installed on the machine that you are using with the LabVIEW MathScript node. The m-script file syntax can be understood by several software packages. The LabVIEW MathScript Node (and MathScript Window in LabVIEW 8.20), are simply providing the capability of LabVIEW to work with m-script syntax. You may also want to take a look at a Developer Zone tutorial for the LabVIEW MathScript Node. I hope this is useful for you. Thanks,
Mike D.
National Instruments
Applications Engineer

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How to call Fortran .dll file that using other library files?

Hi,
I am trying to do some arkward tasks using LabView, and I am desperately need help....
A little bit background:
1. My co-worker has some code written in Fortran, where he called other libraries (many from CERNLAB or PAW). Those stuffs are pretty powerful in mathmatical calculation and simulations.
2. In some of my LabView code, I need to call his Fortran source code in order to do some complicated calculations. I have no capablility to translate his Fortran code to Labview (or is it even possible??), so we end up with trying to use "Call library function node" where I just provide input/outputs to communicate with his code. The idea sounds simple enough?
3. We complie the Fortran code into .dll, and then specifiy the dll in "Call library function node". The first try with a very simple Fortran code, something like c = a+b*a, was sucessful. The dll file and Call lib function worked good. It's sort of proved the concept.
4. Now I am trying more complicated Fortran code (say Test.dll), which calling other library (.lib files) that using typical "call xxx(a,b,c)" line, and my nightmare started.... It seems nothing was excuted when I call Test.dll in LabView.
Questions:
1. How do LabView know if the Test.dll code needs functions from other .lib files? Do I need to copy all the .lib files to a specific folder?
2. When I create .dll file, for LabView to be able to use it, are there any special requirement on the way the .dll is compiled?
3. Seems there is mismatch btw the data type in Fortran and LabView. For example, LabView's Signed 8-bit Integer seems different with a integer in Fortran. How can i know the correlation btw data type in different langurage, i.e. LabView vs Fortran?
4. Are there any good examples that I can take a look?
I would highly appreicate any suggestions/helps!
Rgds,
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You are aware that Intel Visual Fortran is the successor to Compaq Visual Fortran (I think you made a mistype with the Virtual)? So an upgrade might be at its place.
Anyhow I'm really not familiar with Fortran at all, but lib files are usually compiled into an EXE or DLL and not loaded dynamically. 1)
So there should be no problem with locating those libs. What most likely is a problem are other DLL dependencies such as any Fortran Runtime library or possibly other third party DLLs the more advanced code in your DLL might be using.
Typically most compilers can be configured to link the runtime library code statically into the DLL, as altenbach reports for the Intel compiler, otherwise you must make sure to install the redistributable Fortran Runtime Library for your compiler. Besides that you must make sure to find out what other runtime dependencies your code might have and install them.
1) One exception I know of is LabWindows CVI which allows to also load lib files dynamically. This is supposedly a legacy feature from LabWindows for DOS, which allowed that feature to simulate dynamic module loading in order to swap modules at runtime to work around the 640k memory limitation of DOS.
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Fortran array in Labview

Hello!!
I´m having problems to link a fortran code in labview.
When i use a simple integer or real number, the program works. But when i use a array the labview crashes.
Actually i´m using the "library function node" to call the fortran dll and the GFORTRAN compiler for windows. I don´t know where´s the problem. I read some discussions about it but nobody offers a solution.
Please Help!!!
Hello!!I´m having problems to link a fortran code in labview. When i use a simple integer or real number, the program works. But when i use a array the labview crashes. Actually i´m using the "library function node" to call the fortran dll and the GFORTRAN compiler for windows. I don´t know where´s the problem. I read some discussions about it but nobody offers a solution.
Please Help!!!
Solved!
Go to Solution.

You would wire it to the input, but you need to make sure it has the correct size. For safety, you could insert a "reshape array" with the correct size. This will pad or trim to what the dll expects. You could also wire the size as an additional variable.
About the single precision fallback: it really depends on the compiler and the compile options. For example in Intel fortran, compiling with IA32 will use DBL but compiling with SSE3 options would cause a fallback to SGL unless we use an addtional compile option ("/real_size:64") .
I have investigated these issues in detail a while ago, have a look at some of the answers from the experts.
(LabVIEW is much nicer, because if always coerces to the richer representation with mixed operations).
LabVIEW Champion . Do more with less code and in less time .

How can I link between FORTRAN program and Labview

I try to use lapviwe to link betwwen different codes one of the them is FORTRAN *.for and the other is Neurosolution breadboards *.nsb but I don't know how so if you can help me I'll do appreciate that for you.

ahmedr40,
I would suggest building the FORTRAN code into a DLL as well as the breadboard code. You can then use the Call Library Function node to call the compiled code. This would be the easiest and fastest method. You could also compile these pieces of code and link them to some C/C++ code that you can write and then call this code from LabVIEW.
Randy Hoskin
Applications Engineer
National Instruments
http://www.ni.com/ask

Application crashes when calling DLL built with LabVIEW 2011

Hello everybody,
Our application calls DLLs built with LabVIEW 2010 SP1. We installed LabVIEW 2011 and built some DLLs. So far so good. If we start our application and run 2010 DLLs it still works fine. If we run a 2011 DLL just once no error happens, but if we try to run the same 2011 DLL our application crashes reporting the error below. I saved the code for 2010 version and built a DLL and it works fine. Does anyone know why?
Thank you in advance.
#Date: Fr, 16. Sep 2011 16:25:25
#OSName: Microsoft Windows XP Service Pack 3
#OSVers: 5.1
#OSBuild: 2600
#AppName: PasTA
#Version: 11.0f2 32-bit
#AppKind: AppLib
#LabVIEW Base Address: 0x30000000
16.09.2011 16:25:26.181
Crash 0x0: Crash caught by NIER
File Unknown(0) : Crash: Crash caught by NIER
minidump id: 8a779b3f-51d7-4864-8e4d-6ab0195cd158
ExceptionCode: 0xC0000005
N
0x3072C804 - lvrt <unknown> + 0
0x3072CBB8 - lvrt <unknown> + 0
0x7C864191 - KERNEL32 <unknown> + 0
0x7C83AB50 - KERNEL32 <unknown> + 0
0x00000000 - PasTA <unknown> + 0
Attachments:
error.PNG ‏11 KB

On that note, you should be able to create DLLs in 2010 and run them with 2011, correct?? In my case, I have a 2010 built DLL (talking to sbRIO), most of the functions work when run in 2011, but a couple of them lock up LabVIEW on the desktop (but not the sbRIO), no lock ups happen with 2010 on the desktop.

Can I call a built in LabVIEW function remotely?

I would like to call a bunch of LabVIEW's built in GPIB functions on a
remote computer to talk to a device attached to that computer. I was
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Is there a way to avoid making a "wrapper" VI for built in functions
such as GPIB Write? i.e Open a VI reference to built-in LabVIEW
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Thanks,
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Sent via Deja.com http://www.deja.com/
Before you buy.

That is one of the built-in functions and not a stand-alone VI and the best way to call it is to create a VI with it on the block diagram.

I am trying to call a function with LABVIEW developed in CCS compiler

I used MPLAB (CCS compiler) to develop c code that is used to transmit and receive messages to and from an automotive display. It works great as a stand alone. I would like to call this function from LABVIEW but am having difficulty doing so. Does anyone have experience calling a MPLAB developed project from LABVIEW? Thanks in advance.
Matt

PTE wrote:
I used MPLAB (CCS compiler) to develop c code that is used to transmit and receive messages to and from an automotive display. It works great as a stand alone. I would like to call this function from LABVIEW but am having difficulty doing so. Does anyone have experience calling a MPLAB developed project from LABVIEW? Thanks in advance.
Matt
MPLab is for programming PICs if I'm not mistaken. I'm not sure how you would want to call a function compiled in MPLab from LabVIEW directly. MPLab will create binary code for execution on PICs and there is no LabVIEW that could run on a PIC. On the other hand I didn't think you could create standard Windows DLLs, Mac shared libraries or similar in MPLab at all.
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Rolf Kalbermatter
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Can i call winmain function in labview

hello everyone,
Well i have written a C++ code that uses the winmain function (windows function). i want to convert this code into dll and call that dll into labview.
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Thank you.
Royal tiger......

You didn't say what development environment you're using, so I'm assuming Visual Studio. It sounds like you created a Win32 app (as opposed to an MFC app). This has a "WinMain" function. The prototype for WinMain is geared towards it being called by the OS when you run the executable. You could just add the __declspec(export) directive in front of the return type, but you also need to change some build functions in Visual Studio to get a DLL. You probably also don't need all the arguments that WinMain uses. You're probably better off by starting with a new DLL project in order to get the framework for a DLL, and then copy and past the function code. That's what I would do.
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Calling Fortran from Java

Is it possible to call Fortran code from java??

You can use Runtime.exec() to run an application written in Fortran.
If you can write C/C++ code which interacts with something written in fortran then you can use JNI to connect it to java.
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Labview Dll call library function Causing Labview to unload

I am trying to use the Call Library function in Labview 7.1 to call an Init function for a Zathic Can4USB device. When I run the vi, it complete log LabView out of the computer. Can anyone tell me why the function totally unloads LV without displaying an error?
Thanks

Either the function has a serious bug or you are calling it with
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threaded blue screen of dead which when you get it really means a full
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Check the documentation for this function and try to see where you call
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Rolf Kalbermatter
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

How to call Python Scripts throght Labview

Hi all,
I am new to this community. Need some inputs for following Questions
Questions:
1) How can I call python script from LabView?
(Basically this python script calls some other DLL and print some message, to run the script using Python net in my application .To run my script in python net using following commands: import python script name )
2) In how many ways we can call Python scripts from labview?
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Regards,
Sambasivareddy

One way is to create a client server app and to send arguments to python (and back) over TCP/IP. This work very well.
There is an example on the old OpenG Website about this. Look it up.
Python client to LabVIEW Server.
PJM
Message Edited by PJM_Labview on 03-12-2008 09:00 AM
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Calling fortran subroutine from C in sunstudio

I am using Sun Studio 12 under Linux,
Could anyone give me an example project which shows how to use a fortran subroutine in C.
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Thanks.

Refer to Chapter 11 "C-Fortran Interface" in the Fortran Programming Guide:
[http://docs.sun.com/app/docs/doc/819-5262/aeuku?a=view]

Calling fortran module functions from c++

I am compiling a Fortran module with the Sun Studio Fortran compiler. The functions from this module shall be called from a C++ program. I have a name mangling problem when trying to compile or link. Actually it seems that Fortran provides names like 'module.function_' as can be seen when using nm. Putting this definition into the extern "C" statement makes the C compiler stop. After some excessive googling I found the possible bind(C) function, but this is actually not a valid option since I have not written the Fortran module myself and the solution should be somewhat compatible to other x86 compilers (here: Intel, which works fine for the name mangling)
What is now the best option to use the Fortran module in the C++ program using Sun Studio?
Cheers,
Sebastian
Sun Fire E6900
Sun Studio 12.1

Sebastianm
You do not have to change the calls; you only have to change the declarations of the function in the module to add bind(c,name="whatever). In addition, you will need to recompile the rest of the Fortran code that uses the module so that
the new bind(C) names are used in calls.
Adding a call to the module function for the above example:
subroutine use_example
use example
call print_hello()
end subroutine use_example
% f90 -fast -c use_example.f
% nm -og use_example.o
use_example.o:
[Index] Value Size Type Bind Other Shndx Name
[24] |000000000000|000000000000|FUNC |GLOB |0 |UNDEF |Example_print_hello
[23] |000000000000|000000000013|FUNC |GLOB |0 |2 |use_example_
As you can see, the compiler generates a call to Example_print_hello for the call to the module function print_hello,
as this is the name specified in the bind(c) for example.print_hello, i.e., bind(C, "Example_print_hello").
If you do not want to change the module at all, you might have some luck with *elfedit* to change the external
names after the .o is produced. I suspect that doing this is as much work as adding BIND(C) to the declarations.
Good luck and please let me know if this works for you.
Diane

Dll function calls from VB6 to Labview do not work.

HI,
We are transferring our production test systems from VB6 to Labview, and we are using "CAN-AC2-PCI" cards. When call functions of dll "canacpci.dll", UUT does not response at all, and Labview program does not report any error either. Attached are the user manual and my labview codes.
I guess the DeviceNe_init.vi works because if run it twice, second runing will report error. To correct the error, the card has to be closed first..
I close the card first, then initialize it. After then send the data. But I can not see any communication by DeviceNet Analyzer when sending data.
All function parameters are copied from existing VB6 program. The VB6 program works fine.
Please help me out,
Thanks,
Xiang Zhan
Attachments:
DeviceNe_init.vi ‏36 KB
DeviceNet_SendDataXXXX.vi ‏18 KB
CAN-ACx-PCI.pdf ‏139 KB

Hi Turck,
I'm not familar with this device, and it is difficult to say in this case. I would recommend calling into National Instruments support or contacting the vendor of the device for additional assistance in this case. As this isn't one of NI's Industrial Communications devices, you could also post on the LabVIEW forums for additional assistance, as there are a lot more people looking at that board than this one.
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Matt S.
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National Instruments

File not found when trying to call a dll on LabVIEW Real Time machine

I have a dll called "DLLRTTEST" that I've written, and have succesfully called on my host machine. I'm now attempting to call this dll from a vi that is located on my real time computer. Currently I get an "Error 7 occurred at Call Library Function Node in DLLRTTEST.vi." message upon execution
In the attached screenshot I'm trying to ensure that the vi I'm running is in fact located on the real time system. I then use a "Check if File or Folder Exists.vi" to confirm that the dll that I'm about to call does exist on the real time system as well. However, I still receive an "error 7 file not found" error from the Call Library Function Node.
Any help is appreciated.
Solved!
Go to Solution.
Attachments:
DLL_Call_Screenshot.png ‏61 KB
DLL_Call_Screenshot.png ‏61 KB

As nathand already mentioned, depending on your C toolchain your DLL will depend on other DLLs. Usually the according msvcrtXX.dll that matches your Visual C version, if you use Visual C, other runtime DLLs if you use a different C environment. These runtime DLLs are even necessary if you do not call anything in any of your functions, since the DLL makes various initialization steps when it gets loaded and that references some C runtime functions nevertheless. Compiling and linking the DLL with static C runtime is usually also not a clean solution since the linked in C runtime will then reference Windows APIs that are not available on LabVIEW RT.
Depending on your version of LabVIEW RT you will have some mscvrtxx.dll files in your system directory but it will be an older one than from the latest Visual Studio version. If you can compile your DLL with that Visual Studio version then you should be fine, but could possibly run into new problems if you later upgrade to a newer LabVIEW RT version. Installing the C runtime distributables from newer Visual Studio versions is unfortunately also not a solution, since it references many (undocumented) Windows API functions that are not available in LabVIEW RT.
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Calling fortran f90 in labview

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