diff --git a/app/src/main/kotlin/de/ids_mannheim/korapxmltools/KorapXml2Conllu.kt b/app/src/main/kotlin/de/ids_mannheim/korapxmltools/KorapXml2Conllu.kt
index 694fbf2..43a67f0 100644
--- a/app/src/main/kotlin/de/ids_mannheim/korapxmltools/KorapXml2Conllu.kt
+++ b/app/src/main/kotlin/de/ids_mannheim/korapxmltools/KorapXml2Conllu.kt
@@ -342,6 +342,9 @@
                 if (tagger != null) {
                     targetFoundry = tagger.foundry
                 }
+            } else {
+                LOGGER.severe("KorAP-XML output currently only supports morphosyntactic annotations. Use CoNLL-U (default) output format instead, and pipe through conllu2korapxml.")
+                exitProcess(1)
             }
             dbFactory = DocumentBuilderFactory.newInstance()
             dBuilder = dbFactory!!.newDocumentBuilder()