LabViewLayer.dll in v7.1 but not 8.0?

Hi there,
I'm trying to load a version 7.1 LabVIEW program in v8.0 but am unable to because it is looking for "LabviewLayer.dll". Any ideas of how to correct this?
Thanks much,
Russ

I don't have that file in my 7.1 distribution. You should determine which LabVIEW function is calling this dll and whether it was a part of an NI add-on toolkit or from a third party vendor.

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If you are talking about an existing dll, then the only alternative to writing a wrapper is to use one of the wrapper generators floating around. Do a search on JACE.
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My LabWindows 2012 CVI application crashes when executing DLL function in Release 64 mode, but not Debug 64 mode. The 64-bit DLL was created in Matlab, and executes Matlab functionality.
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Using code interface node with dll crashes LV 2011 but not LV 8.6... using max error handling does nothing

Hi all,
I'm having a peculiar problem.
I inherited a project saved in LabVIEW 8.6. The project must use of particular dll that was built a few years ago. The original developer and source code for this .dll are long gone. The very core logic exists, in the form of embedded C code, and that's it. The .dll is called through a Code Interface Node in LV 8.6 and this setup manages to "work". Howver, running the VI that calls this .dll in LV 2011 causes an "insta crash", as in, no "program has stopped responding". Error message pops up, then all LV windows close.
It's very similar to that described in here:
http://digital.ni.com/public.nsf/allkb/D84C9775ABD921CF8625772A005CA50C
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Using the "Debug" option allows me to run the just-in-time debugger with CVI 2010, which then proceeds to say this:
Finally, I manage to get this out of it:
FATAL RUN-TIME ERROR: Unknown source position, thread id 0x000012D4: A non-debuggable thread caused a 'General Protection' fault at address 0x00000000.
I don't think that really helps at all, but it's there.
Here is the function prototype of the .dll:
void _inputPM@224(uint8_t arg1, uint16_t arg2, uint8_t arg3, float arg4, float arg5, float arg6, float arg7, float arg8, float arg9, float arg10, float arg11, float arg12, float arg13, float arg14, float arg15, float arg16, float arg17, uint16_t arg18, uint16_t arg19, uint16_t arg20, uint16_t arg21, uint16_t arg22, uint16_t arg23, uint16_t arg24, uint16_t arg25, uint16_t arg26, float arg27, float arg28, float arg29, float arg30, float arg31, float arg32, float arg33, float arg34, float arg35, float arg36, float arg37, float arg38, float arg39, float arg40, float arg41, float arg42, float arg43, float arg44, float arg45, float arg46, float arg47, uint16_t arg48, uint16_t arg49, uint16_t arg50, uint16_t arg51, uint16_t arg52, float arg53, float arg54, float arg55, float arg56);
(never seen a function take 50 input params like that (wouldn't you use a struct? array? something? But I digress, and I don't know anything about .dlls...))
I do have a ".lib" and a ".cdb" file with the same name as the .dll, but those also looks like some kind of compiled file.
I'm sure the answer I'm going to get is that there is no way of telling what's really going on without .dll source code. I'm hoping against hope that there may be another way or hack.
Any ideas? Thank you for you help.
Regards,
Mark G
Solved!
Go to Solution.

MarkCG wrote:
Changing the call library node to stdcall (WINAPI) did the trick! No more crash. Thank you very much!
I haven't run LV2011 on windows XP, only on windows 7, so I don't know if that makes a dfference. But The call type makes no difference when using LV 8.6 on the same machine, however.
Now I've got to make the .DLL run corretly on a compact fieldpoint.... and avoid crashing IT.
Thank you for the help all!
Well, the DLL did work fine in LabVIEW 8.6 because earlier versions of LabVIEW automatically proceeded to change the calling convention to stdcall, if they noticed a function name decoration of @# (# = number of bytes passed on the stack) appended to the name. This is the default naming decoration for stdcall functions used by VisualC. However this decoration can be overwritten with linker switches, other compilers don't use them always in the same way, and most likely there are in the mean time compilers out there that can produce such decorations also for non stdcall calling convention. So this automagic trickery was removed from newer LabVIEW versions.
I do think it could be considered a bug in the code that upgrades LabVIEW VIs, that it uses the calling convention that is configuerd in the dialog, instead of the calling convention earlier LabVIEW versions used automagically, but it is an esoteric corner case.
What Compact Fieldpoint controller do you have? If it's anything newer than 20xx or 21xx forget it. The 22xx controllers use a PPC CPU and VxWorks operating system and can never get a Windows DLL to operate properly. If it is a 20xx controller it's still highly likely that DLL can not even get loaded into LabVIEW as it likely relies on other runtime libraries and possibly Win32 APIs not present in the Pharlap ETS runtime kernel used on those controllers.
There is a tool to check a DLL for incompatible imports that are not present on specific ETS RT systems. And this list summarizes the RT system used on the various NI controllers.
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CIT Engineering Netherlands
a division of Test & Measurement Solutions

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== Issue
==
Firefox is having problems with certain web sites
== Description
==
Sometimes (but not always), when I try to open a pdf document from the US bankruptcy court website, I get a window asking if I want to use Adobe Acrobat. After I click "yes", I get a bland screen.
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==
http://
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==
Firefox Version
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Extensions
Name
Version
Enabled
ID
Skype extension for Firefox 2.2.0.70 false
Java Console 6.0.01 false
Java Console 6.0.02 true
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==
3.6.3
== Operating system
==
Windows 7
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==
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==
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W-N-F-I Trigger
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<00> SetDebug: Logging to File chk-debug-new.log
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<99> Win_API(init): Preload location not set
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<99> Win_API(init): DLL Found and Loaded
<99> PreLoad: Args: (None)
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<99> Register_Function_Call: Ftn="d2kwutil_Version", DLL Count=1, Initial Reg
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<99> Register_Function_Call: Ftn="d2kwutil_PlaySound", DLL Count=1, Initial Reg
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<99> Get_Parent_Window: Args: Window_Handle =329460, Recursive=TRUE, RaiseExceptions=FALSE
<99> Get_Parent_Window: Result: RC=0
<99> Add_Error: Get_Parent_Window: Unable to obtain parent window handle
<99> Get_Parent_Window: Args: Window_Handle =329460, Recursive=TRUE, RaiseExceptions=FALSE
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<99> DLLVersion: Args: <No Arguments>
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<99> DLLVersion: Result: Version=D2KWUT60.DLL Version 6.0.6.0 Production
<99> Play_Wav: Args: FileName="SystemStart", Asynchronous=TRUE, RaiseExceptions=FALSE
<99> Register_Function_Call: Ftn="d2kwutil_PlaySound", DLL Count=1, Initial Reg
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<99> Get_Parent_Window: Args: Window_Handle =526002, Recursive=TRUE, RaiseExceptions=FALSE
<99> Register_Function_Call: Ftn="d2kwutil_ParentWin", DLL Count=1, Initial Reg
<99> Get_Parent_Window: Result: RC=198372
What is wrong?
Best Regards
Friedhold

Hi Duncan,
thank you for the tip:
I've modified the OnTop Package and it works fine
in SDI-mode (the Form is permanent on top!):
PROCEDURE Window_On_Top (Window_Name IN WINDOW) is
hWnd PLS_INTEGER;
hParent PLS_INTEGER;
iRC PLS_INTEGER;
BEGIN
hWnd := to_number(get_window_property(Window_Name,WINDOW_HANDLE));
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------- end if;
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END;
Best Regards
Friedhold

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