Index: /issm/trunk-jpl/src/c/classes/FemModel.cpp
===================================================================
--- /issm/trunk-jpl/src/c/classes/FemModel.cpp	(revision 21845)
+++ /issm/trunk-jpl/src/c/classes/FemModel.cpp	(revision 21846)
@@ -2493,5 +2493,5 @@
 			} 
 
-			if(abs(sl[i])>0) _error_("Sea level value "<<sl[i]<<" not supported!");
+			if(fabs(sl[i])>0) _error_("Sea level value "<<sl[i]<<" not supported!");
 			/*update thickness and mask grounded ice level set*/
 			h[i]	  = s[i]-b[i];