Hi all, I still have a problem with the time loop. I get the following error. Traceback (most recent call last): File "<stdin>", line 3, in <module> File "/Users/master/firedrake/lib/python2.7/site-packages/firedrake/constant.py", line 116, in assign self.dat.data = value File "<decorator-gen-21>", line 2, in data File "/Users/master/firedrake/lib/python2.7/site-packages/pyop2/versioning.py", line 115, in modifies retval = method(self, *args, **kwargs) File "/Users/master/firedrake/lib/python2.7/site-packages/pyop2/base.py", line 2761, in data _trace.evaluate(set(), set([self])) File "/Users/master/firedrake/lib/python2.7/site-packages/pyop2/base.py", line 170, in evaluate comp._run() File "/Users/master/firedrake/lib/python2.7/site-packages/pyop2/base.py", line 4070, in _run return self.compute() File "/Users/master/firedrake/lib/python2.7/site-packages/pyop2/base.py", line 4111, in compute fun = self._jitmodule File "/Users/master/firedrake/lib/python2.7/site-packages/pyop2/utils.py", line 64, in __get__ obj.__dict__[self.__name__] = result = self.fget(obj) File "/Users/master/firedrake/lib/python2.7/site-packages/pyop2/sequential.py", line 151, in _jitmodule direct=self.is_direct, iterate=self.iteration_region) File "/Users/master/firedrake/lib/python2.7/site-packages/pyop2/caching.py", line 203, in __new__ obj = make_obj() File "/Users/master/firedrake/lib/python2.7/site-packages/pyop2/caching.py", line 193, in make_obj obj.__init__(*args, **kwargs) File "/Users/master/firedrake/lib/python2.7/site-packages/pyop2/host.py", line 700, in __init__ self.compile() File "/Users/master/firedrake/lib/python2.7/site-packages/pyop2/host.py", line 801, in compile compiler=compiler.get('name')) File "/Users/master/firedrake/lib/python2.7/site-packages/pyop2/compilation.py", line 292, in load dll = compiler.get_so(src, extension) File "/Users/master/firedrake/lib/python2.7/site-packages/pyop2/compilation.py", line 146, in get_so Compile errors in %s""" % (e.cmd, e.returncode, logfile, errfile)) pyop2.exceptions.CompilationError: Command "['mpicc', '-std=c99', '-fPIC', '-Wall', '-framework', 'Accelerate', '-march=native', '-O3', '-I/Users/master/firedrake/lib/python2.7/site-packages/petsc/include', '-I/Users/master/firedrake/lib/python2.7/site-packages/pyop2', '-msse', '-o', '/var/folders/8q/tv2c50fj0n3_27j_3yjmyv7c0000gp/T/pyop2-cache-uid502/59ddbd69d6d404a58876bfb1da21738a_p675.so.tmp', '/var/folders/8q/tv2c50fj0n3_27j_3yjmyv7c0000gp/T/pyop2-cache-uid502/59ddbd69d6d404a58876bfb1da21738a_p675.c', '-dynamiclib', '-L/Users/master/firedrake/lib/python2.7/site-packages/petsc/lib', '-Wl,-rpath,/Users/master/firedrake/lib/python2.7/site-packages/petsc/lib', '-lpetsc', '-lm']" return error status 1. Unable to compile code Compile log in /var/folders/8q/tv2c50fj0n3_27j_3yjmyv7c0000gp/T/pyop2-cache-uid502/59ddbd69d6d404a58876bfb1da21738a_p675.log Compile errors in /var/folders/8q/tv2c50fj0n3_27j_3yjmyv7c0000gp/T/pyop2-cache-uid502/59ddbd69d6d404a58876bfb1da21738a_p675.err How can I fix it? Angwenyi