Ni visa fails after LabVIEW installs the third-party visa software

LabVIEW Install third party VISA After software NI VISA invalid

Previously installed on the system NI-VISA, And can be in 32 Bit NI MAX、LabVIEW Or successfully identify and communicate with instruments in other development environments . Then install another vendor version VISA, for example TekVISA or KeysightVISA. Now in MAX You can no longer see COM Mouth or VISA equipment . Why does this happen , How to solve ？

Solution

Within a given time , There can only be one 32 position VISA Configure as primary VISA. The main VISA Act as the core of the system VISA library .

In the above case ,NI-VISA Initially as the main VISA install , Then install the second VISA when ,NI-VISA Then change to auxiliary .

Reinstall the appropriate NI-VISA The software can be reset to the correct configuration scheme .

If NI-VISA Reinstallation failed , Then you can follow the following steps to NI-VISA Reset to primary VISA：

Verify which VISA Configuration is the main VISA

First , Verify through the following steps NI-VISA Currently not as the main VISA Installed on the system ：

Enter the corresponding directory below according to the navigation of the operating system , find visa32.dll ：

32 Bit system ： C：\ WINDOWS \ system32

64 Bit system ： C：\ WINDOWS \ sysWOW64

Right click visa32.dll And select “ attribute ”.

Find copyright information ：

stay WindowsVista / 7/8/10 On ： Navigate to “ Details ” tab ：.

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If the copyright information statement is NI-VISA Library, be NI-VISA Will be set as the main VISA. If the description shows other companies VISA drive , Please follow these steps to NI-VISA Set as primary VISA.

take NI-VISA Set as primary VISA

1. Navigate to the corresponding directory below according to the number of digits of the operating system , find visa32.dll ：

32 Bit system ： C：\ WINDOWS \ system32

64 Bit system ： C：\ WINDOWS \ sysWOW64

2. take visa32.dll Rename to another name , for example visa32.dll.bak .

3. Repair NI-VISA Runtime, Reinstall according to the guide how to uninstall or repair NI Software

4. Restart the computer .

Related information

Need to rename visa32.dll The reason is that if the current driver version is better than NI-VISA New ,NI-VISA Will not cover the original VISA drive . So only try to install a newer version visa32.dll The file will be overwritten , If you want to repair the previously installed software, it is not .

Be careful ： some 32 position VISA Implementation support as an auxiliary installation , This allows them to interact with 32 position NI-VISA Install side by side .

Be careful ： Primary and secondary VISA The logo is only applicable to 32 position VISA To configure . stay 64 Bit system , Multiple can be installed VISA Configure without encountering this problem .

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LabVIEW Install third party VISA After software NI VISA invalid - Beijing Hanwen Wangxing Technology Co., Ltd (bjcyck.com)