Can LabView 6.1 and 7 be install on one computer?

[ctailor]

I have the application program that I wrote using LabVIEW 6.1. I'm writing another program in LabVIEW 7 which uses lot of sub vis from my old application written in LabVIEW 6.1.

I'm not too clear wheather I should convert my old program from 6.1 to 7? If so, has anybody experienced any problem with backward compability?

Suppose if I didn't convert my application from LabVIEW 6.1, could I use subvis in two different version with same name?

Any help will be useful as I'm worried to loose my working program and have problems!

[Al_S]

If you use the default install directories, LabView 6 and 7 can be installed on the same computer.
If you're using LabView 7 VIs to call VIs which you originally developed in LabView 6, LabView 7 is automatically converting the old VIs as it loads them. It does not attempt to directly run the old VIs. It doesn't automatically save them, so if you exit without saving, the files will be unchanged in their original version.
Before you start any conversion, always make a backup of all your VIs.
If you store the LabView 6 and LabView 7 versions of your VIs in separate directories, they can have the same names.
There may be some minor gitches in the upgrade process, but most VIs will upgrade to version 7 with no problems. I have upgraded some applications with hund
reds of VIs without having to touch them. Some other VIs needed a little work.
Here are some other discussions on the topic.
Click here for a poll,
here for some good advice from Greg McKaskle,
here, or here.

[CoastalMaineBird]

I have both on my computer as I cannot upgrade my clients just yet, so I have to stay with 6.1 for them.

Suggestion: If you want to work with both, keep an alias to each on your desktop. If you're on Windows, after you open an LLB with version 7 - it mangles the connection so that when you double-click on an LLB, it asks you what you want to do with the file you're about to download (???). If you switch versions, drag the LLB onto the appropriate alias, and it'll straighten out.

Suggestion: Copy all your cross-version projects into a separate directory for LV 7. If you work on a VI in those projects, do the work on LV 6, then copy the VI into the LV7 project directory. A Lot easier than saving for previous.

Do you need to keep LV 6.1 ?? If you're
just worried about the switch, don't be. Back it up on CD or whatever (you should do that anyway), then convert the whole mess.