Index: src/java/org/apache/poi/ss/formula/atp/AnalysisToolPak.java
===================================================================
--- src/java/org/apache/poi/ss/formula/atp/AnalysisToolPak.java	(revision 1426148)
+++ src/java/org/apache/poi/ss/formula/atp/AnalysisToolPak.java	(working copy)
@@ -24,6 +24,7 @@
 /**
  * @author Josh Micich
  * @author Petr Udalau - systematized work of add-in libraries and user defined functions.
+ * @author Johan Karlsteen - added IFERROR
  */
 public final class AnalysisToolPak implements UDFFinder {
 
@@ -112,7 +113,7 @@
         r(m, "HEX2BIN", null);
         r(m, "HEX2DEC", null);
         r(m, "HEX2OCT", null);
-        r(m, "IFERROR", null);
+        r(m, "IFERROR", IfError.instance);
         r(m, "IMABS", null);
         r(m, "IMAGINARY", null);
         r(m, "IMARGUMENT", null);
