[SOLVED] Activity as parent - by: Lee

hi,
I've copied a activity.
I've modified the parent activity and specify as parent the source activity.

Erreur sur finalizeMessageDisplay('resultDiv') :
La destination n'est pas un 'node' ou pas un 'widget'
ou lastOperation or lastOperationStatus n'est pas un 'node'.
Fatal error: Maximum execution time of 600 seconds exceeded in C:\Projeqtor\App\model\ProjectPlanningElement.php on line 262

I forgot to do something ?