PC crashes when loading NI USB-8451 driver

[Richard Horn]

We have bought a NI USB-8451 SPI unit. When first connected to the PC, a message appears to ask to load the relevant driver. I point it to \Program Files\National Instruments\NI-845x\staging\ni845x.inf which it loads but then immediately causes the PC to crash and reboot (PC uses Windows XP). Trying on a another PC gives blue screen message of problem with file "Diego.sys". The driver version is the latest (v1.1.2). I tried downloading older versions of the driver from the NI website, but when installed the directory \staging with the ni845x.inf file does not appear (some clash with newer versions of MAX?), so could not tell if they made a difference. Do you have any suggestions as to the problem? Thanks,

Richard.

[Nisar F]

Dear Richard,

I hope you are doing fine. Thank you for contacting National Instruments. Could you tell me if you have  any other National Instruments products installed on your pc such as DAQmx drivers or LabVIEW ? And are they working fine ?

Best regards,

[Richard Horn]

Hello Fawad,

We had a temporary fix by using an earlier version of the driver (v1.0) the on an older machine but still cannot get this to load on newer machines. No other NI software present on the machine (except MAX and VISA which are installed at the same time as the driver). I tried updating VISA to the latest v4.5.

On some machines the driver appears to install okay then when I run MAX I get blue screen crash. I tried bypassing MAX by using the Visual C to call the driver functions, the problem seems to occur when calling ni845xFindDevice - again blue screen crash. As we want to run the unit from MSVC we will need to use a newer version of the driver (v1.1 or v1.1.2).

Thanks,

Richard. 

[Richard Horn · Accepted solution]

Problem solved by removing Safend USB protector software