Syntax of Try {} catch {} for updation in X++

void clicked()
{

#OCCRetryCount   
#task; 　

super();
try
{ 
     // logic
}
catch (Exception::Deadlock)
{
      retry;
}
catch (Exception::UpdateConflict)
{
       if (appl.ttsLevel() == 0)
      {
           if (xSession::currentRetryCount() >= #RetryNum)
          {
                throw Exception::UpdateConflictNotRecovered;
          }
      else
     {
           retry;
     }
}
else
{
     throw Exception::UpdateConflict;
}
}
catch (Exception::Error)
{
       throw error("Label");
}
    Table_ds.research();

}