diff --git a/arc-ws/src/main/java/fr/insee/arc/ws/services/importServlet/dao/ClientDao.java b/arc-ws/src/main/java/fr/insee/arc/ws/services/importServlet/dao/ClientDao.java
index 8f4ac37e6..6a937d0f5 100644
--- a/arc-ws/src/main/java/fr/insee/arc/ws/services/importServlet/dao/ClientDao.java
+++ b/arc-ws/src/main/java/fr/insee/arc/ws/services/importServlet/dao/ClientDao.java
@@ -378,8 +378,7 @@ public String getAClientTable(boolean isSourceListTable) throws ArcException {
 						+ (isSourceListTable ? "" : "NOT") + " like " + requete.quoteText("%id\\_source%"));
 
 		String selectedTableName = UtilitaireDao.get(0).getString(connection, requete);
-		
-		return this.client + selectedTableName.substring(this.client.length());
+		return selectedTableName==null? null : this.client + selectedTableName.substring(this.client.length());
 		
 	}