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RE: st: option nullok

Subject   RE: st: option nullok
Date   Thu, 08 Apr 2010 10:27:41 -0500

Bulent Guloglu <> is receiving the following error message:

option nullok not allowed
 stata():  3598  Stata returned error
   _b_table::di_titles():     -  function returned error
           _coef_table():     -  function returned error
                 <istmt>:     -  function returned error

As Martin pointed out this is caused by an incomplete update resulting in the
ado files and the executable being out of sync. This can be fixed by fully
updating Stata. To do this, type

  	. update executable, force

  	. update swap

	. update all

This will shut Stata down and start it back up again, so you don't want to be
in the middle of anything when you do this. The -update swap- is a very
important step. If an update is incomplete Stata can behave unpredictably.
After the update is completed successfully, Bulent should try the -xtreg-
command again.


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