Hi, I have the following wide data. I want to convert it to long.

Code:
* Example generated by -dataex-. To install: ssc install dataex
clear
input int st_ut byte st_utt int st_wb float date
   9  1    . 21989
   9  1    . 21990
  10  1    . 21991
  11  1    1 21992
  10  1    1 21993

end
format %td date
I used the following code
Code:
reshape long st_, i(date) j(state)
However I get an error
variable state contains all missing values
.