LabVIEW API for VCI V4 (vcilva.dll) not working for labview 2024 64 bits

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Greeshma Narahari

• 2025年07月14日 06:27
• 編集済み

I have a library in labview 2020 32 bit which was using vcilva dll (vci v3.5 on windows 10)

code works well in the above mentioned setup opening can connection.

now, i migrate the code to labview 2024 64 bit and vci driver 4-0-1240.

The same code wont work anymore, i tried with both vcilva and vcilva2 dlls.

is there any upgrades performed on the dlls , any help is appreciated

this is the error i see

0

• 正式なコメント

  

  Andreas Stobe

  • 2025年07月14日 08:49

  Dear Greeshma,
  
  

  1. The VCI V3 automatically installs the LabView Addon.
     
     For VCI V4, the LabView Addon must be installed separately
     (You can find it in the same ZIP file with the VCI V4, in the sub directory Addons).
     https://www.hms-networks.com/p/1-01-0281-11001-ixxat-usb-to-can-v2-compact?tab=tab-support
     
     32 Bit DLLs under 32 Bit Windows:
     C:\Windows\System32\vcilva.dll
     C:\Windows\System32\vcilva2.dll
     
     64 Bit DLLs under 64 Bit Windows:
     C:\Windows\System32\vcilva.dll
     C:\Windows\System32\vcilva2.dll
     
     32 Bit DLLs under 64 Bit Windows:
     C:\Windows\SysWOW64\vcilva.dll
     C:\Windows\SysWOW64\vcilva2.dll
     
     
  2. Usually your application should run successfully with the VCI V4 if,
     you installed the LabView Addon, or
     if you simply copy the vcilva.dll into the same directory as your exe file.
     (Please make sure to use the 32bit version of the vcilva.dll in this case.)
     
     
  3. If you have any further technical questions,
     please register in our online support tool and create a support request:
     https://support.hms-networks.com/hc/en-us
     
     

  Best regards
  Andreas
  
  
• 

  Greeshma Narahari

  • 2025年07月14日 08:59

  Hello Andreas,

  I am using

  64 Bit DLLs under 64 Bit Windows:
  C:\Windows\System32\vcilva.dll - for labview 64 bit code ----it wont work
  
  32 Bit DLLs under 64 Bit Windows:
  C:\Windows\SysWOW64\vcilva.dll - the same code in labview 32 bit ---it works.

  im not sure what the change in dlls, the code is same. i did create a support request with id 1474422. 

  Thanks for your help

   

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• 

  Andreas Stobe

  • 2025年07月14日 09:10

  Dear Greeshma,
  
  You are right, the 64bit vcilva.dll does not run because it use 64bit handles, while your 32bit application uses 32bit handles.
  However, 64bit operating systems support 32bit applications and 32bit DLLs.
  
  Thank you very much for your support request in our online support tool.
  I have sent to you the current version of the LabView Addon there.
  
  Best regards
  Andreas
  
  

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• 

  maurizio.motterlini

  • 2025年09月25日 16:05

  Hi everyone, I'm experiencing a similar issue with the "vcilva.dll" and "vcilva2.dll" drivers installed by the LabVIEW add-on (both VCI3 and VCI4) on a Windows 11 system.

  Unfortunately, the OS doesn't recognize them as safe drivers and marks them as untrusted due to an expired security certificate.

  I forced the installation anyway, but Secure Boot blocks it, and WIN11 shows a blue screen as if the OS has been corrupted.

  Is there an updated version of the LabVIEW drivers with a valid certificate that can pass Windows 11 security checks?

  If not, how can I solve this problem?

  Thanks in advance for any help!

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• 

  Andreas Stobe

  • 2025年09月26日 06:55

  Dear Maurizio,
  
  I can send you the signed LabView Addon for VCI V4.
  Could you please register on our online support portal at
  https://support.hms-networks.com/hc/en-us
  and create a support request there, asking for the signed LabView Addon for VCI V4?
  Thank you!
  
  Best regards
  Andreas
  
  

  0

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