Difference between MAINTENANCE and NEEDSUPGRADE

soeinz · Post by **soeinz** » Wed Oct 31, 2007 4:02 pm

Hi,

In the help file the descriptions of the NEEDSUPGRADE and MAINTENANCE pre-defined variables are:

MAINTENANCE=Initially TRUE if application has been installed before
NEEDSUPGRADE: TRUE if a previous version of the product was found

So can someone explain the difference to me.

Thanks.

Gizm0 · Post by **Gizm0** » Wed Oct 31, 2007 8:00 pm

MAINTENACE turns into TRUE when a you click at the "Add/Remove" button.
NEEDSUPRADE turns into TRUE, when a new setup is trying to be installed with the same ProductCode but with a different revision code.

swarovski · Post by **swarovski** » Wed Oct 31, 2007 8:59 pm

Gizm0 wrote:MAINTENACE turns into TRUE when a you click at the "Add/Remove" button.
NEEDSUPRADE turns into TRUE, when a new setup is trying to be installed with the same ProductCode but with a different revision code.

Is there a variable available that like NEEDUPGRADE turns into TRUE only that the Setup.exe version is higher than the installed version?

Currently, I have to check it manually.

Gizm0 · Post by **Gizm0** » Thu Nov 01, 2007 9:19 am

If you change your version number, you should also change your revision code (InstallAware does this by Default). You don't need to check it manually.

swarovski · Post by **swarovski** » Thu Nov 01, 2007 8:48 pm

Yes, but it still allow a user to proceed 1.0 installation even the current installed version is 1.1.

Currently I have to manually check this to prevent...

Gizm0 · Post by **Gizm0** » Fri Nov 02, 2007 5:41 am

Well, i guess if someone tries to install a previous version for a reason, you should allow him to. That's my opinion of course.

TMacy · Post by **TMacy** » Sun Nov 04, 2007 6:36 am

Uh... we put CD's out every quarter. We have an unbelievable number of customers that "loose" their most current CD... and then think the need to reinstall, so will try to use an older CD. Maybe you have customers that have a valid reason to install an older version. Ours just do it by mistake.

Chris Miller · Post by **Chris Miller** » Fri Nov 09, 2007 10:40 am

You could write a version number to the registry at install time and check against that version when installing over an existing version. If the new version is older than the existing version, you would display an error dialog and terminate the install.

Personally, I think the default behavior should be to disallow installs of previous versions over newer ones, but it's easy enough to code that rule in.

Chris Miller
VersaTrans Solutions

TMacy · Post by **TMacy** » Fri Nov 09, 2007 10:44 am

Yes... that's what we did last week. Looks like it should work.

Thanks!

Difference between MAINTENANCE and NEEDSUPGRADE

Difference between MAINTENANCE and NEEDSUPGRADE

Maintenance

Yep