TMS320F28388D: failure to change the package information in 28388D dual core demo

Hi experts,

Good day! I am using a empty 28388D dual core demo "empty_c28x_dual_sysconfig_multi" in c2000ware "C2000Ware_5_01_00_00\driverlib\f2838x\examples\c28x_dual\empty_projects".  

I changed the package information after build it automatically change back to default package setting.

For example: 

the default setting is 176 pin.

If I change the "part" from F2838x_176pin to F2838x_337bga and save it.

After I open the sysconfig again, the setting is back to F2838x_176pin.  

But I check the file "empty_c28x_dual_sysconfig_cpu1.syscfg" in notepad, the configuration is F2838x_337bga.

Did I miss some steps to change the package information? Could you give me some advices?

Thanks!

Best Regards

Kita