d postmiss.  Modification of ^post^ to allow expressions to be missing
d Program by Vince Wiggins, StataCorp <vwiggins@@stata.com>.
d Tech support distribution, 06 May 1999.
d
d ^postmiss^ behaves just like ^post^, except when an exp cannot be 
d evaluated -- for example, when an expected saved result or coefficient 
d could not be calculated.  In such cases, ^postmiss^ posts a missing "." 
d for these expressions; conversely ^post^ will fail and issue an error 
d message.
d
d Distribution-Date: 18may1999

f postmiss/postmiss.ado
f postmiss/postmiss.hlp