The maximum character limit in a Tab file name in Mapinfo Pro

The length of the name of a MapInfo Tab file is not limited but is truncated to 30 characters on the Explorer pane.  You can create a longer tab file name and it will use it, but it will be truncated wherever its used.(Layer control, Table List, dialogs, etc.).

The full file name is is shown when you hover over the map layer name in the Explorer tab.

User-added image

Internally MapInfo Pro uses a fixed character limit for all table "aliases". This is the name that is used to identify a table and it must be unique in any MapInfo Pro session. 

UPDATED:  July 25, 2019