Error in calling up function 'BAPI_APOATP_CHECK' in APO server 'xxxx'

Hi all,

When we make an ATP check from CO09 in our test R/3 system we get the following error message:

Error in calling up function 'BAPI_APOATP_CHECK' in APO server 'DDC7': RFC destination DDC7 does not exist.

However, the server the error message refers to is our productive system and we want to do ATP in our test APO system. We have just refreshed our test systems and run BDLS to update all tables and integration models. But somewhere it must have gone wrong. Does anyone know where it is defined which system CO09 tries to connect to?

Best Regards

Trine