I have an InfoPath form created in 2003 or 2007, and I am trying to edit this form in InfoPath 2013, the problem is I was not able to view the source code, when I click on rule inspector I can see the programming function written within this form, but with a yellow message "Version Migration Required"
also when I open Form option I noticed the its written InfoPath 2003 and I am not able to edit the code