InstallExecuteSequence表包含在两个不同位置声明的操作“RemoveExistingProducts”

Question

根据http://blogs.msdn.com/b/astebner/archive/2008/10/19/9006538.aspx建议在WiX升级期间保留配置文件，我已将以下行添加到InstallExecuteSequence：

<RemoveExistingProducts After="InstallFiles"></RemoveExistingProducts>

编译WiX解决方案时会弹出以下错误：

The InstallExecuteSequence table contains an action 'RemoveExistingProducts' that is declared in two different locations.  Please remove one of the actions or set the Overridable='yes' attribute on one of their elements.

为什么会这样？以及如何解决它？

Answer 1

您应该尝试删除此行：

<RemoveExistingProducts After="InstallFiles"></RemoveExistingProducts> 

并将 Schedule =“afterInstallExecute”添加到MajorUpgrade Element，如下所示：

<MajorUpgrade Schedule="afterInstallExecute" 
              DowngradeErrorMessage="Newer version installed. Exiting." />