APO/gATP- Plng object xxx and basic method ATP have been locked (check not possible) Message no. /SAPAPO/ATP102

Hi,

I have encountered en error as the title:

"Plng object xxx and basic method ATP have been locked (check not possible)"

Message no. /SAPAPO/ATP102

Should I pay any special attention besides unlocking in SM12?

Thanks,

Ying