Entry Point Error in GPIB diagnostic

Hello, I am having an issue with communicating my instruments. 

I have a KCPI 488A GPIB card and GPIB 488 driver installed on my system. (I also have NI software installed on the system)

I tried to run test with GPIB Diagnosis but it gives Entry point error saying 
"_ni488config_UnlockNI488@Config@0 could not be located at the dynamic link library C\Windows\System32\gpib-32.dll"

** I use LabView to communicate with the instruments. This same configuration has been working fine for last two years. A few days back i connected a tektronics funciton generator and communicated with it via labview. It worked fine. But after that this issue came up. I dont know if these are related but just stating in case they are.

** please look at the attachments

Please help !!

Thank you

Check your gpib-32.dll properties.  Is it from NI or Keithley or possibly CEC?

My guess is that something installed the NI driver for GPIB.  And it over-wrote the required version of that DLL needed by the KPCI-488A card.
Can you reinstall the driver for KPCI-488A?

Thank you Andrea for your response. Yes NI driver was previously installed but was uninstalled later.&#160; Some other NI Softwares were installed were still installed on the system. So i unistalled all of them and deleted gpib32.dll and gpibconfig.dll files from System32 and SysWOW64 as these were from National Instruments. Then I reinstalled GPIB 488 driver from Keithley. Now the diagnostic test runs fine.<br> <br> But my goal is to work with LabView. So i will have to install NI Software at some point. Should I install NI Software or will i face the same issue again ?<br> <br> Thank you&#160;

When you run into the trouble, find the gpib related DLL and right click to see properties; &#160;namely the author/publisher.<br> <br> You can have LabVIEW and other NI software (VISA) installed. &#160;Just don’t let the NI support for GPIB cards install, else it will overwrite the DLLs that need to be for your KPCI488-488A gpib interface card.<br> One strategy would be to install&#160;KPCI488-488A driver after other NI related software is installed.<br> &#160;