Index: trunk/BNC/src/combination/bncbiassnx.cpp
===================================================================
--- trunk/BNC/src/combination/bncbiassnx.cpp	(revision 10816)
+++ trunk/BNC/src/combination/bncbiassnx.cpp	(revision 10818)
@@ -148,4 +148,10 @@
         continue;
       }
+      // change of sign
+      // --------------
+      // post-processing convention is to subtract biases
+      // real-time convention is to add biases.
+      value *= -1.0;
+
       // conversion of Code Biases
       // -------------------------