Index: /issm/trunk-jpl/src/c/shared/Elements/PddSurfaceMassBalanceSicopolis.cpp
===================================================================
--- /issm/trunk-jpl/src/c/shared/Elements/PddSurfaceMassBalanceSicopolis.cpp	(revision 23320)
+++ /issm/trunk-jpl/src/c/shared/Elements/PddSurfaceMassBalanceSicopolis.cpp	(revision 23321)
@@ -69,6 +69,11 @@
     IssmDouble inv_s_stat  =1.0/s_stat;
     IssmDouble inv_sqrt2   =1.0/sqrt(2.0);
+
+	 #if defined(_HAVE_ADOLC_)
     pdd=pdd+(s_stat*inv_sqrt2pi*exp(-0.5*pow(tstar*inv_s_stat,2))
 				 +0.5*tstar*erfc(-tstar*inv_s_stat*inv_sqrt2))*inv_twelve;
+	 #else
+	 _error_("Cannot differentiate erfc, talk to ADOLC folks (http://functions.wolfram.com/GammaBetaErf/Erfc/20/01/)");
+	 #endif
 
 	 /*Partition of precip in solid and liquid parts, Bales et al. (2009) */