Old Version Error

Which Nw version and which OS?

On what platform are you doing your install? How are you performing you Client install? What version of NW?

When you perform a NW install/upgrade and if an older version exist NW should give you the option to Remove the existing version. Have you tried to follow the prompt and complete the Remove regardless? and see what NW comes up with.

I know you said that Nw was never installed on those machines, but at least Windows Installer is finding something there about it.

I would, just to be sure, search the registry for nsr, NetWorker, legato etc, and also the upgrade codes 2827A1B508153.D114831000A9C877BD1 and/or 3EB2C626C9BC4D118811000972CCA7DF. These are steps in esg67621, that you can find in the KB.

As we're talking about Windows, a reboot may help

In extreme cases, I would go to update the Windows Installer, may be your case, at least in the W2k machine.

OS: 2003 Standard Edition / 2000 Server SP4 / 2003 R2 Standard Edition
NW: 7.3.3 (7.3 SP3 Build 510)

I have 6 machines that is failing with that error and they are using thise 3 systems above ..

HabibG2 -> Im just installing it from the setup file from the "networker733_win_x86" and it has worked fine on 70+ machines ..

i can't follow the promt because there is no promt beside the error you can see the error here ->
http://img225.imageshack.us/my.php?image=olderversionyr1.jpg
and when i press "Ok" this screen comes ->
http://img153.imageshack.us/my.php?image=olderversion2tk2.jpg
So it don't promt me for uninstalling the old version ..

When i searched for NetWorker there was a tread in the database

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\Networker
and there was a string with the name "C:\ISM\2.20\bin\liblocal.dll" and i looked up the file and that is a file from Legato, but it's from 2004 .. in some of the other folders from C:\ISM\2.20 there is files that have been in use lately..

HKEY_LOCAL_MACHINE\SOFTWARE\Informix\DBMS\9.40\Setup\Directories
In this string the name "C:\ISM\2.20\bin" is precent in a REG_SZ so Informix must be using the files that belong to Legato ?

in the string is there also a REG_SZ that is named C:\NSR (the folder is empty)

else there was nothing on when i searched the words you gave me and the numbers ..

Before you delete/change any registry entry I srongly suggest you export the hive to a .reg file just in case you experience any problem.

Well, if you have entries like Networker, liblocal.dll and C:\NSR, you had Networker installed in this machine. Did you find these strings in the other machines also? Do the other machines have Informix installed?

At this point, you should contact EMC support or your Informix support to verify if you can delete those entries in registry (and the files/folders).

Take a look at Services, may the Networker service is still installed.

But if you like to take risks, I would just delete this:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Eventlog\Application\Networker

And the one about C:\NSR. If it's all you have in registry, this should allow a new installation of the client.