I have a existing thinapp that i'm trying to update. I was hoping to run sbmerge and rebuild the source files. From the cmd entry point I'm trying to run msiexec /update app.msp but it's erroring out "The windows installer service could not be accessed. this can occur if you are running in safe mode...."
I can just redo the entire package with the latest updates but I was hoping to save some time. Is this method not supported or do I need to add something to in package.ini?