When you run a model in DS you automaticcaly get a dataitem with a log file with all the log4net messages that occured during model run.
'During' means the model is in a running state: (initializing,executing,finishing).
This is done RunningActivityLogAppender listening to changes in activities of activityrunner. So when a model goes to initializing the RALA keeps messages for that model. When the model finishes the RALA adds (or updates) a dataitem in the model.
To make a new version of the flow msi you need two Guids. One for the product (upgradecode) and one for the folder in the start menu.
Create your GUIDS here: http://www.guidgenerator.com/online-guid-generator.aspx
1 Change the OutputName tag in the wixProj file. Keep the suffix of buildnumber as it adds a buildnumber to the msi name.
Changes in the Product.wxs:
2 Change the <?define ReleaseVersion="1.0.1" ?> element and <ProductName> in the Product.wxs
3 Change the GUID for the UpgradeCode in the <Product> element.
4 Use the same GUID as in 3 for the <Upgrade> elementID
5 Change the GUID of the ProgramMenuDir" component.Like this <Component Id="ProgramMenuDir" Guid="CHANGE-THIS-GUID">