User Exit: Saving data in Production Order Header Long Text

Hi PP Gurus,

Can any one let me know which user exit can be used to save some data in the Long Text of Production Order Header.

We try PPCO0007, it works well on ECC, but my client's system version is 4.7, it does not work.

In 4.7 version, is there any other User Exit or BADI can be used to comply with this requirement?

It's quite common requirement, hope someone can help me. Thanks.

Best regards,

Sun Qiang