To reproduce, in master open the user guide to 2.3.x. Then open that exported file with current 2.3.x (or 2.3.0). I get the following messages in the terminal:
Lexer.cpp (933): Missing 'wide'-tag in InsetFloatParams::read. Got alignment instead. Line: 23365 LyX: Bad boolean `alignment'. Use "false" or "true" [around line 23365 of file ~/lyxbuilds/master/repo/lib/doc/UserGuide.23.lyx current token: 'alignment' context: 'InsetFloatParams::read'] Lexer.cpp (933): Missing 'sideways'-tag in InsetFloatParams::read. Got document instead. Line: 23366 LyX: Bad boolean `document'. Use "false" or "true" [around line 23366 of file ~/lyxbuilds/master/repo/lib/doc/UserGuide.23.lyx current token: 'document' context: 'InsetFloatParams::read'] Lexer.cpp (933): Missing 'status'-tag in InsetCollapsible::read. Got wide instead. Line: 23366 Text.cpp (1881): Handling unknown body token: `false' Text.cpp (1881): Handling unknown body token: `sideways false' Text.cpp (1881): Handling unknown body token: `status collapsed' Lexer.cpp (933): Missing 'wide'-tag in InsetFloatParams::read. Got alignment instead. Line: 23408 LyX: Bad boolean `alignment'. Use "false" or "true" [around line 23408 of file ~/lyxbuilds/master/repo/lib/doc/UserGuide.23.lyx current token: 'alignment' context: 'InsetFloatParams::read'] Lexer.cpp (933): Missing 'sideways'-tag in InsetFloatParams::read. Got document instead. Line: 23409 LyX: Bad boolean `document'. Use "false" or "true" [around line 23409 of file ~/lyxbuilds/master/repo/lib/doc/UserGuide.23.lyx current token: 'document' context: 'InsetFloatParams::read'] Lexer.cpp (933): Missing 'status'-tag in InsetCollapsible::read. Got wide instead. Line: 23409 Text.cpp (1881): Handling unknown body token: `false' Text.cpp (1881): Handling unknown body token: `sideways false' Text.cpp (1881): Handling unknown body token: `status collapsed' Scott
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