GSEM error

[Co Ar]

Hello,
Am trying to use gsem probit and finf the following errors:

     _gsem_d2Sigma_db2():  3301  subscript invalid
_gsem_eval_setup__chol_hinfo():     -  function returned error
_gsem_eval_setup__chol():     -  function returned error
      _gsem_eval_setup():     -  function returned error
 _gsem_eval_chol__work():     -  function returned error
       _gsem_eval_chol():     -  function returned error
      mopt__calluser_v():     -  function returned error
       opt__eval_nr_v2():     -  function returned error
             opt__eval():     -  function returned error
opt__looputil_iter0_common():     -  function returned error
opt__looputil_iter0_nr():     -  function returned error
          opt__loop_nr():     -  function returned error
            _moptimize():     -  function returned error
           Mopt_maxmin():     -  function returned error
                 <istmt>:     -  function returned error

[Marcos Almeida]

Maybe it is not related to gsem itself.

According to the Stata Manual

[QUOTE]
traceback log. When a function fails—either because of a programming error or because it was used incorrectly—it produces a traceback log.