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MSI Transaction
This plug-in provided command starts or ends a Windows Installer 4.5 transaction. This command requires Windows Installer 4.5 to be installed on the target system.
Begin New Transaction
Select this option to begin a new MSI transaction. Any Windows Installer based installations that occur after the new transaction has begun can be committed or rolled back in a single step based on installation success/failure states or end-user choice or any other arbitrary factor using this same command.
End Transaction
Select this option to end an MSI transaction that was previously started. Choose the option to have all the installations which were a part of the transaction commit. Choose the option to discard all the installations which were a part of the transaction, returning the system into the prior state before the transaction was begun.
Return result in variable
Indicates the variable to hold the result of the transaction attempt. The variable will hold one of the following values:
| Value | Meaning |
|---|---|
| MSI45REQUIRED | Windows Installer 4.5 is not installed. No action was taken. |
| SUCCESS | Transaction was started or finished successfully. |
| SERVICEUNAVAILABLE | Windows Installer service not available, failed to start transaction. |
| ALREADYRUNNING | An (un)installation is already in progress, failed to start transaction. |
| INTERNALERROR | An internal error occured, failed to start transaction. |
| ROLLBACKDISABLED | Windows Installer rollback disabled, failed to start transaction. |
| ACCESSDENIED | Access denied, failed to end transaction. |
| INSTALLERROR | An (un)installation error occured, failed to end transaction. |
| INSTALLSTILLACTIVE | An (un)installation is still in progress, faield to end transaction. |
If specified, this variable must have been previously defined in the setup script using the Set Variable command.