********>Bugfix 25:
Author: Dave Mathews
Date: 09/29/2004

Programs: sander

Description: If weight changes are used to vary the value of TEMP0 during
             the run, Langevin dynamics will not work properly, since the
             random force properties are not updated correctly.

Fix:  apply the following patch to amber8/src/sander/runmd.f

------------------------------------------------------------------------------
*** runmd.f	2004/08/08 17:32:08	7.258
--- runmd.f	2004/09/29 17:37:03
***************
*** 1012,1017 ****
--- 1012,1027 ----
        !          Loncharich, Brooks and Pastor, Biopolymers 32:523-535 (1992),
        !          Eq. 11.  (Note that the first term on the rhs of Eq. 11b
        !          should not be there.)
+ 
+       !  Update the Langevin parameters, since temp0 may have changed:
+       if (nmropt>0) then
+          sdfac = sqrt( 4.d0*gammai*boltz2*temp0/dtx )
+ #ifdef LES
+          sdfacles = sqrt( 4.d0*gammai*boltz2*temp0les/dtx )
+ #endif
+       endif  
+ 
+ 
        
  #ifdef PSANDER
        do idcmp=0,nneedatm-1
------------------------------------------------------------------------------

Temporary workarounds: none.