id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
471	ropp_pp_occ_tool; numerical differences with ifort16	cburrows	cburrows	"Using GRAS phase/amplitude test data, the test folder test IT-PP-03 gives large numerical differences relative to ifort12. This has been tracked down to the matrix inversion function:

ropp_pp_occ_tool -> ropp_pp_bending_angle_go -> ropp_pp_regression -> ropp_pp_regression -> ropp_pp_quasi_invert -> ropp_pp_invert_matrix

The updates of array 'A' in this function show numerical differences in WRITE statements. This is a starting point for further investigations.

This may be an optimisation issue (-O2 is used here).



"	defect	new	minor	Whenever	ropp_pp	8.0			Ian Culverwell cburrows