diff --git a/src/main/java/com/chaudhuri/cataloggenerator/Generator.java b/src/main/java/com/chaudhuri/cataloggenerator/Generator.java
index d3dc27d..f8ab40c 100644
--- a/src/main/java/com/chaudhuri/cataloggenerator/Generator.java
+++ b/src/main/java/com/chaudhuri/cataloggenerator/Generator.java
@@ -412,14 +412,17 @@ List<ExpansionManifest> parseUrls(List<String> urls) throws Exception {
                 .parallel()
                 .filter(url -> !url.startsWith("#"))
                 .filter(url -> !url.isBlank())
-                .map(e -> {
-                    ExpansionManifest em = getManifestFromUrl(e);
-                    log.info("Parsed {}, found {}", e, em.getIdentifier());
-                    
-                    if (em.getIdentifier() == null || em.getIdentifier().isBlank()) {
-                        log.error("Invalid identifier in expansion {}", e);
+                .map(url -> {
+                    ExpansionManifest em = getManifestFromUrl(url);
+                    if (em == null) {
+                        log.error("Could not parse expansion at {}", url);
+                    } else if (em.getIdentifier() == null || em.getIdentifier().isBlank()) {
+                        log.error("Invalid identifier in expansion {}", url);
+                    } else {
+                        log.debug("Parsed {}, found {}", url, em.getIdentifier());
                     }
                     
+                    
                     return em;
                 })
                 .filter(m -> m != null)