--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/minfo/SedimentLoadYearSelect.java	Mon Apr 15 10:35:24 2013 +0200
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/minfo/SedimentLoadYearSelect.java	Mon Apr 15 10:55:08 2013 +0200
@@ -2,6 +2,11 @@
 
 import org.apache.log4j.Logger;
 
+import de.intevation.artifacts.Artifact;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+
+import de.intevation.flys.artifacts.access.SedimentLoadAccess;
 import de.intevation.flys.artifacts.states.DefaultState;
 
 
@@ -23,4 +28,17 @@
         return "minfo.sedimentload_year_select";
     }
 
+
+    @Override
+    public boolean validate(Artifact artifact)
+    throws IllegalArgumentException
+    {
+        SedimentLoadAccess access = new SedimentLoadAccess((FLYSArtifact) artifact, null);
+
+        // Second year should be later than first.
+        if (access.getPeriod()[1] < access.getPeriod()[0])
+           throw new IllegalArgumentException("error_years_wrong");
+
+        return true;
+    }
 }