diff --git a/common-tools/clas-utils/src/main/java/org/jlab/utils/options/OptionParser.java b/common-tools/clas-utils/src/main/java/org/jlab/utils/options/OptionParser.java
index 5d8f04f81c..7a2df2cac4 100644
--- a/common-tools/clas-utils/src/main/java/org/jlab/utils/options/OptionParser.java
+++ b/common-tools/clas-utils/src/main/java/org/jlab/utils/options/OptionParser.java
@@ -179,6 +179,7 @@ else if(this.containsOptions(arguments,"-v","-version")==true){
             }
         }
         if (this.requiresInputList && this.parsedInputList.isEmpty()) {
+            printUsage();
             System.err.println(" \n*** ERROR *** Empty Input List.");
             System.exit(101);
         }