Hi,
I have a setup consisting in a PC running Win7 x64, LabVIEW 2014 x64, a RS232 instrument, and NI-VISA for the communication. It used to work well but for some reasons I recently got the following error message (-1073807202) when trying to open the COM port:
LabVIEW: (Hex 0xBFFF009E) VISA or a code library required by VISA could not be located or loaded. This is usually due to a required driver not being installed on the system.
I have tried to completely uninstall NI-VISA and install the latest version (17.0) including support for 32b and 64b. However, I still get the same error. When running LabVIEW 2014 x86, no error, it's working. Same results with MAX.
When I install NI-VISA, the default location is C:\Program File (x86)\National Instruments. I have tried to install it in C:\Program Files\National Instruments instead but the installer refuses because of "incompatible product installed" in the directory.
I have check the content of Windows\System32 and there are visa32.dll, visa64.dll, visaConfMgr.dll, visaUtilities.dll
In Windows\SysWOW64: VISA_Shared_CleanupUtility.exe, visa32.dll, visaConfMgr.dll.
Any suggestion would be welcome.
Thanks.
Pierre