4 replies to this topic

[k758]

Hi,
Sometime between 6.2 and 6.31, the UNINSTALL_STRING now contains "-l0x9" at the end of it. This means that anyone following the instructions at <http://www.installsi...AvoidMaint.htm> on how to avoid maintenance mode (which says, in part, to detect the setup being run from Add/Remove Programs based on "if ( (CMDLINE % "UNINSTALL") && MAINTENANCE ) then" being TRUE, has a non-functioning Uninstall.

Does anyone know why or when this change to the default UNINSTALL_STRING value changed, or how the above check must be changed to get around it?

Thanks!
Betsy

[Stefan Krueger]

Why does that cause the uninstall to fail (or the detection)?

That parameter is used to specify the language for the setup. I think it's there to make sure maintenance mode runs in the same language as the initial install, instead of displaying the language selection dialog. Look at the release notes to find out in which version this was changed.

[k758]

It fails (and thus treats a launch from Add/Remove Programs as a reinstall rather than an uninstall) because the lines:

       if (CMDLINE % "UNINSTALL") then
           ComponentRemoveAll();
       else
           ComponentReinstall();
       endif;

evaluates to FALSE since the CMDLINE contains the language identifier as well as my add-on ("UNINSTALL").

How could this statement be changed to strip off the language identifier?

Thanks!

[k758]

Never mind. I can use the StrFind( ) function to determine if the "UNINSTALL" string is present.

However, the InstallSite page dealing with 'how to avoid maintenance mode' (<http://www.installsi...AvoidMaint.htm>) needs to be updated since the code example uses "%" rather than "StrFind".

Thanks!

[Stefan Krueger]

Have you actually tried this with % ? It should work.

CMDLINE = "UNINSTALL" will fail for obvious reasons.

But with % it should work: "If you need only a TRUE or FALSE return value indicating whether one string contains another string, (that is, if the location if the substring is unimportant), use the string find operator (%)" (from the help file for StrFind)

Therefore
CMDLINE % "UNINSTALL"
should evaluate to TRUE if CMDLINE includes the word "UNINSTALL"