269Lastly, it should be recalled that, according to the case-law, the rights of the defence are infringed where it is possible that the outcome of the administrative procedure conducted by the Commission might have been different as a result of an error committed by it. An applicant undertaking establishes that there has been such an infringement where it adequately demonstrates, not that the Commission’s decision would have been different in content, but rather that it would have been better able to ensure its defence had there been no error, for example because it would have been able to use for its defence documents to which it was denied access during the administrative procedure (see, to that effect, Case C-194/99 PThyssen Stahl v Commission [2003] ECR I-10821, paragraph 31 and the case-law cited, and Case C-407/08 PKnauf Gips v Commission [2010] ECR I-6375, paragraph 28).