Error when trying to calculate network efficiency measures (R)


I have been receiving the "could not find function … " error when attempting to use the functions “global_efficiency” and “average_local_efficiency”. I have been using igraph on R (version 4.1.1) for a while and never had similar problems with other functions. Has anyone encountered the same issue and if so how can it be solved?

Thank you

These functions work fine on my system. Note that they were introduced in igraph 1.3.

Please show a minimal reproducible example and indicate your igraph version.