diff --git a/nur_bin/sqlite-storage.php b/nur_bin/sqlite-storage.php
index 7b6d24f..3add3a4 100755
--- a/nur_bin/sqlite-storage.php
+++ b/nur_bin/sqlite-storage.php
@@ -63,15 +63,21 @@ Application::run(new class extends Application {
     if ($dbfile === null) self::die("Vous devez spécifier la base de données");
     if (!file_exists($dbfile)) self::die("$dbfile: fichier introuvable");
     $storage = new SqliteStorage($dbfile);
+    $db = $storage->db();
+
+    $haveChannels = $storage->tableExists("_channels");
 
     $name = $this->name;
     $channelClass = $this->channelClass;
     $tableName = $this->tableName;
     if ($name !== null) {
-      $row = $storage->db()->one([
-        "select from _channels",
-        "where" => ["name" => $name],
-      ]);
+      $row = null;
+      if ($haveChannels) {
+        $row = $db->one([
+          "select from _channels",
+          "where" => ["name" => $name],
+        ]);
+      }
       if ($row === null) self::die("$name: nom de canal de données introuvable");
       if ($row["class"] !== "class@anonymous") $channelClass = $row["class"];
       else $tableName = $row["table_name"];
@@ -87,18 +93,30 @@ Application::run(new class extends Application {
         }
       };
     } else {
-      self::die("Vous devez spécifier le canal de données");
+      $found = false;
+      if ($haveChannels) {
+        $rows = $db->all([
+          "select from _channels",
+        ]);
+        foreach ($rows as $row) {
+          msg::print($row["name"]);
+          $found = true;
+        }
+      }
+      if (!$found) self::die("Vous devez spécifier le canal de données");
     }
     $capacitor = new Capacitor($storage, $channel);
 
     switch ($this->action) {
     case self::ACTION_QUERY:
       $args = $this->args;
+      var_export($args); #XXX
       if (!$args) {
         # lister les id
         $out = new Stream(STDOUT);
         $primaryKeys = $storage->getPrimaryKeys($channel);
-        $rows = $storage->db()->all([
+        var_export($primaryKeys); #XXX
+        $rows = $db->all([
           "select",
           "cols" => $primaryKeys,
           "from" => $channel->getTableName(),
diff --git a/src/app/cli/include-launcher.php b/src/app/cli/include-launcher.php
index a42e227..5a33e7e 100644
--- a/src/app/cli/include-launcher.php
+++ b/src/app/cli/include-launcher.php
@@ -11,9 +11,9 @@ if ($argc <= 1) die("invalid arguments");
 app::init(NULIB_APP_app_params);
 
 $app = $argv[1];
+array_splice($argv, 0, 1); $argc--;
 if (class_exists($app)) {
   # la configuration est celle actuellement chargée
-  array_splice($argv, 1, 1); $argc--;
   $app::run();
 } elseif (is_executable($app)) {
   # la configuration est passée par une variable d'environnement
@@ -21,7 +21,6 @@ if (class_exists($app)) {
   pcntl_exec($app, array_slice($argv, 1));
 } else {
   # la configuration est celle actuellement chargée
-  array_splice($argv, 0, 1); $argc--;
   $name = preg_replace('/\.php$/', "", path::basename($app));
   app::init([
     "name" => $name,
diff --git a/src/db/sqlite/SqliteStorage.php b/src/db/sqlite/SqliteStorage.php
index b6f9ac0..03de35e 100644
--- a/src/db/sqlite/SqliteStorage.php
+++ b/src/db/sqlite/SqliteStorage.php
@@ -28,13 +28,25 @@ class SqliteStorage extends CapacitorStorage {
     return self::format_sql($channel, $query->getSql());
   }
 
-  protected function _afterCreate(CapacitorChannel $channel): void {
-    $db = $this->db;
+  function tableExists(string $tableName): bool {
     $name = $this->db->get([
       "select name from sqlite_schema",
-      "where" => ["name" => "_channels"],
+      "where" => ["name" => $tableName],
     ]);
-    if ($name === null) {
+    return $name !== null;
+  }
+
+  function channelExists(string $name): bool {
+    $name = $this->db->get([
+      "select name from _channels",
+      "where" => ["name" => $name],
+    ]);
+    return $name !== null;
+  }
+
+  protected function _afterCreate(CapacitorChannel $channel): void {
+    $db = $this->db;
+    if (!$this->tableExists("_channels")) {
       # ne pas créer si la table existe déjà, pour éviter d'avoir besoin d'un
       # verrou en écriture
       $db->exec([
@@ -47,11 +59,7 @@ class SqliteStorage extends CapacitorStorage {
         ],
       ]);
     }
-    $name = $this->db->get([
-      "select name from _channels",
-      "where" => ["name" => $channel->getName()],
-    ]);
-    if ($name === null) {
+    if (!$this->channelExists($channel->getName())) {
       # ne pas insérer si la ligne existe déjà, pour éviter d'avoir besoin d'un
       # verrou en écriture
       $db->exec([
@@ -78,13 +86,7 @@ class SqliteStorage extends CapacitorStorage {
   }
 
   function _exists(CapacitorChannel $channel): bool {
-    $tableName = $this->db->get([
-      "select name from sqlite_schema",
-      "where" => [
-        "name" => $channel->getTableName(),
-      ],
-    ]);
-    return $tableName !== null;
+    return $this->tableExists($channel->getTableName());
   }
 
   function close(): void {