Change is 1.3 $reg->include ( 1491859118, [1, 3.25, 10.5625 ] ) $reg->include ( 1491902520, [1, 3.25, 10.5625 ] ) $reg->include ( 1492032609, [1, 2.5, 6.25 ] ) $reg->include ( 1492117432, [1, 2.5, 6.25 ] ) $reg->include ( 1492204208, [1, 2.5, 6.25 ] ) $reg->include ( 1492291088, [1, 2.5, 6.25 ] ) $reg->include ( 1492377875, [1, 2.5, 6.25 ] ) $reg->include ( 1492464416, [1, 2.5, 6.25 ] ) $reg->include ( 1492551241, [1, 2.5, 6.25 ] ) $reg->include ( 1492623578, [1, 2.5, 6.25 ] ) Results are ... **************************************************************** Regression 'gotsvl2143.dpcmsr1t.TOOLS' **************************************************************** Report.pl::Statistics::Regression:standarderrors: I cannot compute the theta-covariance matrix for variable 3 0