A newly installed Octave on both Windows 7 and Ubuntu 17.10 produces this error when solving the differential equation example:
>> f = dsolve(de, y(0) == 0, diff(y,1)(0) == 0 , diff(y,2)(0) == 1) error: Python exception: NotImplementedError: CRootOf is not supported over EX occurred at line 2 of the Python code block: sol=sp.dsolve(ode) error: called from python_cmd at line 179 column 7 dsolve at line 200 column 10