v3or4,1995 App ok Win 3.1,95,98 Does not work in NT4.0, XP,2000

[AnalyzerIII]

Labview serial communication with real time display, graphics and data logging developed in ~1995 for one of our analyzer units. Runs in win 3.1, 95 and 98. Never ran in NT 4.0. How can I get it to run in XP or 2000.Labview version may be 3.x or 4, not sure, can't locate SW.Thanks

[Dennis_Knutson]

If it runs in win 3.1, I think that means LabVIEW 3 which was a 16-bit version of LabVIEW. Win 95 and 98 will run 16-bit apps but NT, 2K, and XP are for 32-bit only. The only way I know to get it to run in a new OS is to load the source code into a newer LabVIEW and rebuild it.

[AnalyzerIII]

Found the disks and it appears to be Labview 4.0. Does that make a difference?

[Dennis_Knutson]

It will make the conversion to a newer version of LabVIEW easier. If it had been LabVIEW 3.x, you would not be able to directly load the VIs into labVIEW 6 or 7. If all you have is an older version, you'll have to rebuild it at the very least in order to run under WinNT, 2k, or XP. I don't remember at what point NI dropped support for Win 3.x but I do remember that the last version that did had two different application builders. You should also be aware that the first version of LabVIEW that NI officially support for WinXP is version 6.1.

[AnalyzerIII]

What about Windows XP capability to roll back the operating system to Me, 98, or 95. Ha NI provided any rollback assistance (files etc)? See attached Microsoft link to the roll back feature:
http://www.microsoft.com/windowsxp/pro/techinfo/planning/appcompat/default.asp

[Dennis_Knutson]

Not that I know of. I think the main reason 6.1 was the first version supported for XP is that XP wasn't out when 5.1 or 6.0 was released and NI only evaluates current versions of their software. You may not have any problems. There have been several postings about users successfully using older versions of LabVIEW with XP. If you do have problems, you just won't have any official support from NI.

[AnalyzerIII]

Further update...
Got Labview to work on Win XP Pro on a PII 400.
However, the serial rs 232 communication is slow getting a response from our equipment. We communicate at 19200. Tried to remove many of the "services" in xp that seemed irrelovent to our application(as I think most are totally needless) with some improvement. Also, downloaded "serpdrv" files from NI but none of the newer ones listed worked at all. My Labview program tries to communicate about once per second and I get data delay warnings if there is no response after 3+ seconds. Any further thoughts... Thanks

[AnalyzerIII]

Further update...
Got Labview to work on Win XP Pro on a PII 400.
However, the serial rs 232 communication is slow getting a response from our equipment. We communicate at 19200. Tried to remove many of the "services" in xp that seemed irrelovent to our application(as I think most are totally needless) with some improvement. Also, downloaded "serpdrv" files from NI but none of the newer ones listed worked at all. My Labview program tries to communicate about once per second and I get data delay warnings if there is no response after 3+ seconds. Any further thoughts... Thanks"