diff --git a/consultar_horario.php b/consultar_horario.php
index e4e30ec..5da5739 100644
--- a/consultar_horario.php
+++ b/consultar_horario.php
@@ -43,12 +43,13 @@ $write = $user->admin || in_array($user->acceso, ['w']);
                     <?php
                     #$carreras = query("SELECT * FROM FS_CARRERA WHERE FACULTAD = :fac AND PERIODO = COALESCE(:per, PERIODO) ORDER BY CARRERA", [":fac" => $user->facultad['facultad_id'], ":per" => $user->periodo], single: false);
                     // repliaction of the query in the database with database class
-                    $nivel = $db->where('id', $user->periodo)->getOne('fs_periodo');
-                    $carreras = $db
+                    $nivel = $user->periodo ? $db->where('id', $user->periodo)->getOne('fs_periodo') : false;
+                    
+                    $carreras = $nivel ? $db
                         ->orderBy('carrera')
                         ->where('facultad', $nivel['facultad_id'])
                         ->where('nivel', $nivel['nivel_id'])
-                        ->get('fs_carrera', 100, 'id, carrera');
+                        ->get('fs_carrera', 100, 'id, carrera') : [];
 
                     ?>
                     <div class="form-group row">
@@ -282,7 +283,7 @@ $write = $user->admin || in_array($user->acceso, ['w']);
                             <div class="form-group row">
                                 <label for="editor_salón" class="col-4 col-form-label">Salón</label>
                                 <div class="col-6">
-                                    <input type="text" class="form-control" id="editor_salón" name="salón" placeholder="Salón" maxlength="10" required="required">
+                                    <input type="text" class="form-control" id="editor_salón" name="salón" placeholder="Salón" maxlength="100" required="required">
                                     <div class="invalid-feedback">
                                         El salón no puede estar vacío.
                                     </div>