why my resid always N/A?

[skripmin]

its normal ? or abnormal?

i did this step
file / open / foreign data as workfile and go to my excel file
i want to do glejser test for heteroskedasticity, so i must absolut my resid, but my resid always N/A

Im newbie here, just read the tutorial book, and no information about this in this book.
can you help me?

[EViews Gareth]

The residual series will be NA until you estimate an equation