AttributeError: 'int' object has no attribute 'is_Mul'

[AMzaheri]

Hello,

I’ve been trying to run the adjoin modeling example, but I encountered the following error. I was wondering if you could advise me how to solve it. The error is:

Traceback (most recent call last): File "~/FWI/adjoint.py", line 48, in stencil_v = Eq(v.backward, solve(pde, v.backward)[0]) File "~/.conda/envs/devito/lib/python3.10/site-packages/sympy/solvers/solvers.py", line 1038, in solve if fi.is_constant(): File "~/.conda/envs/devito/lib/python3.10/site-packages/sympy/core/expr.py", line 628, in is_constant expr = expr.simplify() File "~/.conda/envs/devito/lib/python3.10/site-packages/sympy/core/basic.py", line 1763, in simplify return simplify(self, **kwargs) File "~/.conda/envs/devito/lib/python3.10/site-packages/sympy/simplify/simplify.py", line 746, in simplify expr = short.xreplace(hollow_mul) File "~/.conda/envs/devito/lib/python3.10/site-packages/sympy/core/basic.py", line 1183, in xreplace value, _ = self._xreplace(rule) File "~/.conda/envs/devito/lib/python3.10/site-packages/sympy/core/basic.py", line 1198, in _xreplace a_xr = _xreplace(rule) File "~/.conda/envs/devito/lib/python3.10/site-packages/sympy/core/basic.py", line 1198, in _xreplace a_xr = _xreplace(rule) File "~/local/devito/devito/finite_differences/derivative.py", line 225, in _xreplace return self._new_from_self(subs=subs), True File "~/local/devito/devito/finite_differences/derivative.py", line 202, in _new_from_self return Derivative(expr, *self.dims, **_kwargs) File "~/local/devito/devito/finite_differences/derivative.py", line 107, in new obj._ppsubs = as_tuple(frozendict(i) for i in kwargs.get("subs", [])) File "~/local/devito/devito/tools/utils.py", line 49, in as_tuple t = tuple(item) File "/local/devito/devito/finite_differences/derivative.py", line 107, in obj._ppsubs = as_tuple(frozendict(i) for i in kwargs.get("subs", [])) File "~/local/devito/devito/tools/data_structures.py", line 456, in init self._dict = self.dict_cls(*args, **kwargs) File "~/.conda/envs/devito/lib/python3.10/site-packages/sympy/core/rules.py", line 57, in getitem if self._filter(key): File "~/.conda/envs/devito/lib/python3.10/site-packages/sympy/simplify/simplify.py", line 741, in x.is_Mul and AttributeError: 'int' object has no attribute 'is_Mul'

Thank you,