### Elements of finitely presented module

Hello everyone,

I am computing group homology and have to deal with huge boundary matrices. The result should be a finitely presented Z-module. But I got the following problem

```
M = Matrix(ZZ,3,[2,1,0,0,0,0,0,0,0])
V = M.left_kernel()
N = Matrix(ZZ,2,[0,2,2,0,0,0])
W = N.image()
Q = V/W
Q.0
```

Then I got the warning

"repr(sage.modules.fg_pid.fgp_module.FGP_Module_class_with_category.element_class at 0x7ff4aad554b0) failed: AttributeError: 'sage.matrix.matrix_integer_sparse.Matrix_integer_sparse' object has no attribute '_clear_denom'

Do you have any idea how I can get through this? I want to know information about the generators of Q.

I can't even ask for its additive order

```
x = Q.0
x.additive_order()
```

Thank you!