Undefined setBufferTime

When trying to set buffer time on a client that i want to
play a live stream from FMS3, i get undefined error:
1061: Call to a possibly undefined method setBufferTime
through a reference with static type flash.net:NetStream.
Piece of the code that generates it:
quote:
var nc:NetConnection = new NetConnection();
var ns:NetStream;
var btn:but=new but();
var btn2:but2=new but2();
function playStream(){
ns = new NetStream(nc);
ns.setBufferTime(2);
ns.addEventListener(NetStatusEvent.NET_STATUS,
eventListener);
ns.client = new CustomClient();
video.attachNetStream(ns);
ns.play("clientPlayStream");
nc.connect("my_streaming_url"); is called when the client
starts.

Huzzah. I finally have justification for keeping all those uni notes.
I can't fully explain it here, its been some years and I don't have a copy of Labview to poke around with.  So I'm sorry if this is not 100% correct.
Essentially I was getting the error because I was passing the ActiveX components bad inputs and they in turn were spitting back error messages which were not being correctly interpreted by LabView.  This confused me as the error code was not in the documentation for LabView or the Baldor software I was using.
I managed to work around by trial-and-error to find out what inputs worked.
I stumbled accross the solution by chance (about two weeks before the project was due and after finishing most of the work, such is life) there is an ActiveX error handling function somewhere, if linked to the error output of the ActiveX command function it would give you a useful answer.
Hope I'm not too late to help, feels a bit like http://xkcd.com/979/

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        //    Find out how many devices are attached
        XEM_Device = okFrontPanel_Construct(  );
    //    XEM_Device = okCFrontPanel( void );
    //    NoDevices = GetDeviceCount( );
        printf("%d OK devices attached\n", NoDevices);
        //    Call the contructor?    
    //    okCFrontPanel ();
        return XEM_SUCCESS;
    Now, I searched the forums and found the bits about adding #define _WIN32_WINNT 0x0501 prior to inclusion of windows.h.  Did that.  No joy.
    Then I searched some more and found the bit about changing the build options to uncheck the "prototype required" flag.
    Done.
    This seemed to work at first (the above code could be built with no errors, and appeared to run).
    So I thought maybe I had it, and added the next line, so:
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        // Load the FrontPanel DLL
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            printf("Could not load FrontPanel DLL\n");
            exit(-1);
        //    Find out how many devices are attached
        XEM_Device = okFrontPanel_Construct(  );
        OpenBySerial( XEM_Device, "UaLgzvVpBJ" );
    //    XEM_Device = okCFrontPanel( void );
    //    NoDevices = GetDeviceCount( );
        printf("%d OK devices attached\n", NoDevices);
        //    Call the contructor?    
    //    okCFrontPanel ();
        return XEM_SUCCESS;
    Now it doesn't complain about no prototypes (duh), but instead I get linker errors:
        Undefined symbol '_OpenBySerial@0' referenced in "XEM.c".
    So, dredging through the .h and .c files, I found a couple of things:
    in the okFrontPanel.c file I found the following:
    okDLLEXPORT ok_ErrorCode DLL_ENTRY
    okFrontPanel_OpenBySerial(okFrontPanel_HANDLE hnd, const char *serial)
        if (_okFrontPanel_OpenBySerial)
    ;  return((*_okFrontPanel_OpenBySerial)(hnd, serial));
        return(ok_UnsupportedFeature);
    In the okFrontPanel.h file I found:
    and also:
    okDLLEXPORT ok_ErrorCode DLL_ENTRY okFrontPanel_OpenBySerial(okFrontPanel_HANDLE hnd, const char *serial);
    So, I see them in the .h & .c files, but the linker is bombing out.
    I smell a problem with actual code to link being in the DLL...  How do I resolve this, any ideas?  Or am I doing something so stupidly (and obviously) wrong that I'm being blinded to it?

    Hi tomii,
    My suspicion is that these issues are due to using a C++ dll in a C environment. There are inherent challenges with performing such an operation as you have to make sure all your parameters and settings are correct.
    I also could not find the documentation that the Opal Kelly dll is ANSI C but it sounds like you can use this in C with some reconfiguration. I would recommend using their forums to get more information on what steps need to take place to get things working in ANSI C.
    From the information you provided, I did find some resources on the missing prototype error and undefined symbol issue with the linker.
    For the missing prototype I found a thread of someone actually using LabWindows and seeing this compiler error you may want to look at
    http://bytes.com/topic/c/answers/695019-missing-prototype
    I found a few cases where using a function definition of int func(void) removes such issue when int func() does not.
    Another link I found that may be worth a look can be found at http://www.parashift.com/c++-faq-lite/mixing-c-and-cpp.html
    It gives some good pointers to mixing C and C++ code. Some of it may be applicible in your case.
    And, a resource for your undefined symbol linking issue.
    http://www.cprogramming.com/tutorial/compiler_linker_errors.html
    Hopefully these resources will give some context for getting things compiling and working with your dll.
    Good luck!
    James W.
    Applications Engineer
    National Instruments

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