*******>Bugfix 48:
Author: Ross Walker and Mike Crowley
Date: 08/19/2005
Programs: sander
Description: A parameter in the nmrred.f file was incorrectly defined as
             an integer instead of a _REAL_. This can lead to some machines
             giving incorrect (negative) temperatures for TEMP0 and or other
             problems related to nmr weight restraints when either value1 or
             value2 was set to exactly 0.0.
Fix:  Apply the following patch to 
--- nmrred.f	2005-08-19 16:17:07.000000000 -0700
+++ nmrred.f	2005-08-19 16:17:15.000000000 -0700
@@ -215,7 +215,7 @@
    parameter (iflag = 28)
    ! ... ZERNER is a value near zero used for weights set to 0.
-   integer zerner
+   _REAL_ zerner
    parameter (zerner = 1.0d-7)
    character(len=8) type,flag(iflag)
    character(len=10) redirc(8)

Temporary workarounds: Do not use values of exactly zero for nmr weight changes.