I have defined a Maintenance Plan in Microsoft SQL Server 2012. It doesn't execute and it says

   DTS_W_MAXIMUMERRORCOUNTREACHED.
 The Execution method succeeded, but the number of errors raised (2) reached the maximum allowed (1); resulting in failure.
 This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors////

Where should change it?