Has anyone installed LV 6.1 AND 6.02 in the same PC?

[Navini]

I have test systems deployed using LV 6.02 and one system uses 6.1. I don't want to upgrade all the systems but I need to support both locally using one PC if possible.

[Dennis_Knutson]

At one point, I had 6.0.2, 6.1, and 7.0 on one pc. I had no problems. The 6.1 installation will not overwrite anything except for hardware drivers (GPIB, DAQ, etc) but shouldn't pose a problem.

[EdDickens]

Different version of LabVIEW can peacefully co-exist on a PC. The different versions will get installed in their own directories under the main National Instruments directory. You should also uninstall old DAQ drivers and install the latest available for your newest version of LabVIEW. That will contain drivers for earlier versions as well. I currently have LabVIEW 5.1, 6.0.2, 6.1, 7.0 and 7.1 installed.

Toolsets can be a problem as some of them will only allow you to install in a single installation of LabVIEW, so you must manually copy the tools to other versions installed.

Ed

[sammi]

Once my friend has installed different version in the same PC, it worked well untill the system was broken up. Then, when he install the software again, all the vi writen by earlier versions have been replaced by latest one.
Are there any solutions to this problems? What should be pay attention to?

Thanks!

[sammi]

Furthermore, could anyone tell me, the way to open vi in newer version is to install the version since only earlier version in my PC?

[EdDickens]

It sounds like he may have installed the newer version into the older versions directory by mistake. If that's what happened, there's really no easy way to fix it.

Reguardless of how it happened, the best way to correct the problem would be to uninstall all NI related software using the Windows Add/Remove Programs feature, then start reinstalling, starting with the oldest version of LabVIEW first. Do a Custom install on the older versions and do not install any drivers until you are installing your newest version. This driver set will find the other versions of LabVIEW and install the correct drivers for everything.

Hope this helps.

Ed

[EdDickens]

If you are trying to open a VI created in 7.0 with and earlier version of LabVIEW, you have to go through a step down process.

LabVIEW can save a VI to the previous version of LabVIEW only. So if the VI was saved in 7.0, then it can be saved to 6.1. Then the VI must be opened in 6.1 and saved down to 6.0.

One thing to remember here is that the newer versions contain new features that did not exist in the earlier versions, so down saving like this may or may not give you a working VI. It depends on what's in the code.

To save to a previos version, open the VI in the correct version of LabVIEW, then go to the File menu and select "Save with Options...". In the dialog on the left hand side you will see a selection for "Save for Previous
". Click this selection and follow the prompts to save your VI. This will also save all the sub-vis of the top level VI.

Ed

[sammi]

Thanks a lot!