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We give a counter example to the comparison principle for the multipoint BVPs (byXuxin Yang, Zhimin He, and Jianhua Shen, in Mathematical Problems in Engineering, Volume 2009,Article ID 258090, doi:10.1155/2009/258090). Then we suggest and prove a corrected version ofthe comparison principle

A Note on the Paper “Multipoint BVPs for Second-Order Differential Equations with Impulses” by Xuxin Yang, Zhimin He, and Jianhua Shen