--- a/src/GuileHandler.h	Fri Dec 13 22:19:41 2019 +0100
+++ b/src/GuileHandler.h	Sat Dec 28 15:36:38 2019 +0100
@@ -275,7 +275,7 @@
 
 		generateVariableMappings();
 
-		if (currentRelationConfiguration->debugVariableMapping) debugVariableMapping(name);
+		if (currentRelationConfiguration && currentRelationConfiguration->debugVariableMapping) debugVariableMapping(name);
 
 		if (!currentRelationConfiguration || !currentRelationConfiguration->drop) relationalWriter->startRelation(name, currentWriterMetadata, true);