Test 1:  Calling mynormal to check if it computes log likelihood and
         does not alter coefficient vector...
         FAILED; mynormal returned error 198.
Here is a trace of its execution:
------------------------------------------------------------------------------
-> mynormal __00000A __000007 __000008 __000009
            - `begin'
            = capture noisily version 10: mynormal __00000A __000007 __000008 __000009
              ---------------------------------------------------------------- begin mynormal ---
              - version 10.0
              - args lnf mu sigma
              - quietly replace 'lnf'=ln(normalden(i, 'mu', 'sigma'))
' invalid name
              ------------------------------------------------------------------ end mynormal ---
            - `end'
            = set trace off
------------------------------------------------------------------------------
Fix mynormal.
r(198);