diff --git a/src/main/java/org/extendj/ragdoc/RagDocBuilder.java b/src/main/java/org/extendj/ragdoc/RagDocBuilder.java
index d2be8b2585678178bb43e392b70d11fa0a32a754..bef16cd9a0b12f426b232a597fcbf47972fd55ad 100644
--- a/src/main/java/org/extendj/ragdoc/RagDocBuilder.java
+++ b/src/main/java/org/extendj/ragdoc/RagDocBuilder.java
@@ -81,6 +81,9 @@ public class RagDocBuilder extends Frontend {
     System.out.println("Analyzing source tree...");
     long start = System.currentTimeMillis();
     int result = super.run(args, reader, parser);
+    if (result != 0) {
+      return result;
+    }
     if (program.options().hasOption("-version")
         || program.options().hasOption("-help")
         || program.options().files().isEmpty()) {