Spectrum input MAKE_SOURCE 1 6 1 POINT_SOURCE 3 0 0 0 0 pt_source source.xml PROPAGATOR 1 9 FULL false WILSON 0.11 SIMPLE_FERMBC 1 1 1 -1 CG_INVERTER 1.0e-8 1000 pt_source pt_prop Discard the unwanted source ERASE_NAMED_OBJECT 1 pt_source Save the propagator QIO_WRITE_NAMED_OBJECT 1 pt_prop LatticePropagator ./my_prop SINGLEFILE Compute the spectrum. This version is a clone of the one below, but the xml output is written to a separate file. SPECTRUM 1 12 true true false true true true true 2.5 2 false 3 true GAUGE_INV_GAUSSIAN 2.0 5 2.5 0 pt_prop spectrum.out.xml 4 4 4 8 11 11 11 0 SZIN ./test_purgaug.cfg1