Possibly, packaging with the plugin version of iTween is not working out too well with most projects. However, unless your project is small I don’t think switching over to the install version of iTween would be in your best interest since the namespaces are inherently different and you’d have to re-do all of the iTween stuff. It’s not an insurmountable task, but it isn’t trivial. It’s a whole afternoon of work or more.
I’m not 100% sure what this error is referring to. Normally, undefined symbol means that you’ve declared a function in your header but haven’t provided implementation in the source. There is definitely implementation in the source, however.
If you aren’t using slate tweens (and if you aren’t using C++, you definitely aren’t), try removing the STweenableWidget class from iTInterface.h and all of the functions that derive from STweenableWidget in iTInterface.cpp (all of the ones that begin with STweenableWidget:
Cool that fixed it. I remove all the STweenableWidget class references from iTInterface.h, iTInterface.cpp, iTweenEvent.h and iTweenEvent.cpp and rebuild it.
Thanks for the help.