I am Teruhiro Komaki of frudens Inc.
When developing FileMaker, I think it is common to prepare the development environment separately from the production environment.
Also, after releasing the initial version of the system, the developer will modify the development environment and release it to the production environment at an arbitrary timing.
Therefore, when releasing, it is necessary to migrate the data in the production environment to the Clone file of the development environment (Data Migration).
In the past, it is probable that many developers themselves create data migration tools themselves, rehearse in advance, and do release work.
Or you may be using RefreshFM etc.
However, as you can see in this title, I think that there are more cases to use the CLI tool FMDataMigration from now on.
FMDataMigration is a CLI tool available when subscribing to FileMaker Developer Subscription (FDS).
For details, it is good to look at the link below.
FileMaker Developer Subscription
Introducing FileMaker 17’s FMDataMigration Command Line Tool
FileMaker Data Migration Tool Guide