erl_interface registry

The registry functionality part of erl_interface was as of OTP 23 deprecated and was removed in OTP 24.

Compilation of Latin-1 Encoded Erlang Files

The Erlang compiler now refuses to compile source files encoded in Latin-1 without a %% coding: latin-1 comment at the beginning of the file.

igor and erl_tidy modules in syntax_tools

The igor and erl_tidy modules have been removed from OTP and is now maintained by their original author Richard Carlsson. They can be found at github.com/richcarl/igor and github.com/richcarl/erl_tidy, respectively.

Distributed Disk Logs

The distributed disk_log feature was as of OTP 23 deprecated and was removed in OTP 24.

Old Crypto API

The Old API was removed in OTP 24. The support was formally deprecated as of OTP 23.

For replacement functions see the New API.

Megaco version 3 encoding config

The pre-release version 3 encoding configs; prev3a, prev3b and prev3c was removed in OTP 24. Use the full version instead.

The (encoding) config option for the full version, {version3, 3}, will still be supported, even though its no longer necessary to specify it this way.