TAUP is best for systems such as metals and alloys where the expected crystal systems are CUBIC, TETRAGONAL, ORTHORHOBIC and HEXAGONAL. Using TAUP for monoclinic can take hours and using TAUP for triclinic can possibly take days.

From the CRYSFIRE documentation:

"Typically this (TAUP) takes 10-20 seconds down to orthorhombic on a 200MHz Pentium, over an hour down to monoclinic, and forever (?days, ?weeks) down to triclinic.

Thus, being exhaustive, TAUP is useful down to orthorhombic, but in general it is more efficient to try other programs such as ITO, TREOR and LZON before considering low-symmetry searches with TAUP. By default under CRYSFIRE, TAUP halts after orthorhombic. Low-symmetry searches can be interrupted with ctrl- Break, but, as with DICVOL, the last output buffer will then not be saved."