Hi Davidcav,
Some of the IAR projects default to using the JLINK JTAG debugger interface. When Kinetis was first out and being tested that was the only debugger interface available.
Now the OSJTAG from P&E is used on the Tower.
Highlight your application project and select Options.
Then click onthe Debugger Category.
Set the Driver to PE micro.
Click OK.
Regards,
David