I tried to run the commands of the following page
On this page, imposebianchi(); is followed by an error message.
Same error is shown when I run these commands in same order in Cadabra2. I think
imposebianchi() has some error. Please have a look. Thanks.
impose_bianchi is one of the few algorithms of 1.x not yet available in 2.x. I'll try to get this ported over the next few days.