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My program installation sometimes gives the following error in the installer log:
`Failed to grab execution mutex. System error 258.`
Does anyone have any more information on what this is?
Thanks
It means that you are trying to install or uninstall another MSI while installing your package.
If you need to install other packages, you can add them as prerequisites. This is done differently for each setup authoring tool. You cannot use custom actions for this, at least not in InstallExecuteSequence.
_MSIExecute Mutex
Summary: One Execute sequence per machine and one UI sequence per process.