Try "sympref diagnose" for more information.
error: called from
assert_have_python_and_sympy at line 61 column 7
python_ipc_popen2 at line 79 column 5
python_ipc_driver at line 62 column 15
pycall_sympy__ at line 163 column 11
valid_sym_assumptions at line 38 column 10
assumptions at line 82 column 7
syms at line 97 column 13
Python and SymPy are needed for most features of the Symbolic package.
But I install Python and Sympy by anaconda and add it to system path. Is there any way to solve it?