Judgment of the General Court (single judge) of 18 March 2010 - KEK Diavlos v Commission (Case T-190/07) Financial assistance for the European citizen information programme (Prince) - Project concerning preparation for the introduction of the euro in schools - Decision ordering reimbursement of the advance paid - Duty to state reasons - Error of assessment Actions for annulment - Grounds - Lack of or inadequate statement of reasons - Error of assessment (Art. 230 EC) (see paras 36-39, 48, 50-52, 66-67, 70, 74, 77) Re: APPLICATION for annulment of Commission Decision C(2006) 465 Final of 23 February 2006 ordering the reimbursement of the advance, together with interest, paid under a contract for financial assistance, concluded under the Prince programme, for an operation entitled `The EURO - its genuine and essential impact on school children' (Eurogenesis), concerning preparation for the introduction of the euro in schools. Operative part The Court: 1. Dismisses the action; 2. Orders KEK Diavlos to pay the costs.