So alias command stops working after 50 uses ingame. With no way to reset it. That makes it kinda pointless.

This is what I did. I changed check_alias so it resets the ch->cmd_recurse

bool check_alias(CHAR_DATA *ch, char *command, char *argument)
{
  char                    arg[MIL];
  ALIAS_DATA             *alias;

  if((alias = find_alias(ch, command)) == NULL)
    return FALSE;

  if(!alias->cmd || !*alias->cmd)
    return FALSE;

  snprintf(arg, MIL, "%s", alias->cmd);

  if(ch->cmd_recurse == -1 || ++ch->cmd_recurse > 50)
  {
    ch->cmd_recurse = 0;
    interpret(ch, (char *) "alias";
  }

  if(argument && *argument != '\0')
  {
    mudstrlcat(arg, " ", MSL);
    mudstrlcat(arg, argument, MSL);
  }

  interpret(ch, arg);
  return TRUE;
}

Ok, don't advise doing that causes ingame crashes after awhile. Need a better fix, than what I offered.