2. Updating files with convert-ly

The LilyPond input syntax is routinely changed to simplify it or improve it in different ways. As a side effect of this, the LilyPond interpreter often is no longer compatible with older input files. To remedy this, the program convert-ly can be used for upgrading files to newer versions of LilyPond.

Other languages: deutsch, español, français, magyar, italiano, 日本語.
About automatic language selection.

LilyPond — Usage v2.18.2 (stable-branch).