diff -up src/sage/sandpiles/sandpile.py.orig src/sage/sandpiles/sandpile.py --- src/sage/sandpiles/sandpile.py.orig 2018-05-05 16:21:26.000000000 -0600 +++ src/sage/sandpiles/sandpile.py 2018-05-16 13:28:24.939025388 -0600 @@ -342,9 +342,6 @@ from sage.arith.all import falling_facto from sage.rings.all import Integer, PolynomialRing, QQ, ZZ from sage.symbolic.all import I, pi -# TODO: remove the following line once 4ti2 functions are removed -path_to_zsolve = os.path.join(SAGE_LOCAL,'bin','zsolve') - class Sandpile(DiGraph): """ Class for Dhar's abelian sandpile model. @@ -5199,7 +5196,7 @@ class SandpileDivisor(dict): sign_file.close() # compute try: - os.system(path_to_zsolve+' -q ' + lin_sys + ' > ' + lin_sys_log) + os.system('zsolve -q ' + lin_sys + ' > ' + lin_sys_log) # process the results zhom_file = open(lin_sys_zhom,'r') except IOError: