As the owner of the third highest vault outdoors in history, McCartney wants to compete on the biggest stages but Zurich was simply beyond her -- and there's no point taking risks.
After the Czech Republic, her season is over and she'll head home for several weeks complete break.
''It's the only time in the year you get to have a break,'' she told the Herald this month. ''I really do look forward to it. It's like the cherry on top after the season.''
McCartney has produced three personal best vaults in this, her best season.
She'd been hoping to end on a high. She had three events lined up after Birmingham. Now she's down to one — and that has a question mark beside it.