Hi, I think there may be an issue with the current version of NGSolve: NETGEN-6.2-dev, NGSolve-6.2.1706-31-g90557d7. When I try to access the components of a linear form, an exception is thrown in cpython/listobject.c line 307. This error occurs, for example, in ngsolve-src/py_tutorials/compound.py. Please let me know if this is not the appropriate forum for reporting issues.
Thanks!