diff --git a/ace_fcs.dll b/ace_fcs.dll
index 189c3c0826..2cb8b86de2 100644
Binary files a/ace_fcs.dll and b/ace_fcs.dll differ
diff --git a/extensions/fcs/ace_fcs.cpp b/extensions/fcs/ace_fcs.cpp
index 6338dd8571..a1a3b64ba7 100644
--- a/extensions/fcs/ace_fcs.cpp
+++ b/extensions/fcs/ace_fcs.cpp
@@ -21,7 +21,7 @@
 #include <string>
 
 #define MAXELEVATION 20
-#define MAXITERATIONS 120
+#define MAXITERATIONS 600
 #define PRECISION 0.1
 #define RADIANS(X) (X / (180 / M_PI))