two version of LabVIEW installed. Unable to open older VI's with older LabVIEW

[LASER18]

I currently have LabVIEW 6 and LabVIEW 8.5 installed on my PC running Windows XP. When I try to open an older VI via LabVIEW 6, I get the following error message:

An error occurred loading VI 'Global-file paths.vi' LabVIEW load error code 9: VI version (8.5) is newer than LabVIEW version (6.0).

I'm trying to open a (dll) file with LabVIEW 6. I recently upgraded the labVIEW version to 8.5, but now i'm unable to run the older VI's in either version of LabVIEW.

What should I do?

[crossrulz]

That error is the classic "I opened a VI in a newer version and saved.  Oops.  I wanted to keep it in the newer version."  I would think you should still be able to open it in LabVIEW 8.5 though.  If you switch between versions a lot, you need to be very careful which version opens a VI.  I recommend having 1 version of LabVIEW open at a time and only try to open a VI when you have the right version opened.  Otherwise whatever version you used last will try to open the VI.

[JÞB]

You CAN always restore the 6.i vis from your source code control repository can't you?

Spoiler

Oh boy I hope they have a source code repository-  that could get very ugly otherwise.

[LASER18]

I haven't made a source code control repository.

When I try opening the VI with LabVIEW 8.5 I get the following error:

Error Loading 'C:\Program Files\National Instruments\LabVIEW 8.5\vi.lib\lvdaq.dll" A dynamic link library (DLL) initialization routine failed.

When I try opening the VI with LabVIEW 6 I get The following error:

Sub-vi is not executable. The Error list then says that "Call Library Function: function not found in library. However when I get to the configure the library screen the Library Name or Path is correct. Attached is a screen shot.

What is the best way to approach this problem?

Thanks in advance.

[Dennis_Knutson]

The error is not saying the path is incorrect. It is saying the function was not found. What version of the driver is installed? Try doing a repair or reinstall.

[LASER18]

If I choose to uninstall LabVIEW 8.5 leaving only LabVIEW 6, will the problem be fixed?

[altenbach]

Have you tried reinstalling the traditional DAQ drivers? See also.

[LASER18]

Yes, i've reinstalled the traditional DAQ driver ( Traditional NI-DAQ (Legacy) 6.9.3) and I'm still having the same error.

[JÞB]

"The Problem" is thsat you saved the vi while editing it in LabVIEW .8.x  LabVIEW 6.i cannot possibly know what software from a decade into the future means.  Post your busted vis over to the version conversion board.  AND GET a repository set up.