Diagnosis
You are trying to assign an object to account that has not been releasedfor account assignment.

System Response
The system cannot carry out the account assignment.

Procedure
Release the object for postings.
To do this, go to the master data processing screen and carry out theactivity there. Contracts are automatically released for accountassignment when they are released. If you have to carry out accountassignment on a contract that is not yet active, you can release thecontract in the master data dialog in the same way as you release otherobjects. This does not mean that the contract automatically takes partin periodic postings, but you can still assign costs and revenues to it.