# ErlInterface Release Notes

## ErlInterface 3.3

### Improvements and new features

- ErlInterface has been rewritten extensively. The library `ei` is now documented and supported. The old `erl_interface` is considered obsolete, and provided only for backward compatibility.
- ErlInterface is now thread-safe, and multiple C-nodes may run from the same process.
- New functions are added for connecting and accepting connections from `ei`; these are documented in `ei_connect` .
- New functions are added for converting to and from erlang binary format; these are documented in `ei`.

There are also release notes for older versions.