For the details see ReadMe.html and ReleaseNotes.html inside AmiBroker folder.
UPGRADE POLICY
This version is a free upgrade only for users who registered AmiBroker after November 27, 2020 . Users who registered earlier, would need to purchase license upgrade. To find out the version you currently have use Account Information page at https://www.amibroker.com/members/info.php
CHANGES FOR VERSION 6.42.0 (as compared to 6.41.0)
UI: If modal window is displayed (like Filter dialog) and user clicks on blocked parent 3 times in a row, the modal window is repositioned to where mouse cursor is, to bring attention of the user to the modal window that needs to be closed
Scheduler: added "Pause" button to pause execution of scheduled tasks (batches already running will complete normally)
IQFeed: the plugin now has an option to consolidate unbundled ticks (i.e. ticks with same TickID)
IQFeed: the plugin now has "Symbol guide" context menu option
Fixed possible crash when drawing pointer become invalid (now drawings are referred by bound checked index)
AFL: one-shot auto-save of persistent static variables feature is now available via SetOption("StaticVarAutoSave", -1 )
AFL: new field supported by GetOption("BHSymbol") - get Portfolio B&H symbol. Note that this is read-only (can't set it via SetOption)
The new line character MUST NOT be used in Plot() names because Plot names are used for parameters (ParamField) and using new lines causes parameter corruption.
Plot names should describe NAME, not formatting. So only alphanumeric characters are allowed.
Your code is bad and should be fixed.
If you need line breaks in your Titles, you can use Title variable assignment that allows free formatting including new line characters.
No, this is not negotiable. Chart names were NEVER intended to contain new line characters. Using it that way was abusing the Plot() function. The new error simply sanctions what was ALWAYS prohibited.
The Title variable is what you should use if you want new lines and custom titles.
Title = "This\nIs\nYour\nCustom Title"; // only here you can use new lines
You can also use auto-wrap that wraps the title automatically according to screen (it also requires for proper operation that new line characters are NOT included in chart names)