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Copy caveats from RELEASE-NOTES to UPGRADING

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Scott Kostyshak 2015-11-07 01:49:02 -05:00
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How do I upgrade my existing LyX system to version 2.1.x?
How do I upgrade my existing LyX system to version 2.2.x?
---------------------------------------------------------
* Upgrading from LyX 2.1.x:
With LuaTeX, LyX now uses polyglossia instead of babel if the language
package option "Automatic" is selected. In order to use babel, select
"Always babel" instead.
The format of preference and session files has changed. LyX 2.2.x is able to
read old files but will save them in the new format.
The format of layout files has changed but, as before, layout2layout.py will
convert older versions to the new format automatically.
The prefix for subsections in labels and references has been changed from
"sub:" to "subsec:" in order to avoid a clash with subfloats (conflicting
\subref command, see bug #7550). Files are automatically converted to the new
scheme. Please assure that you adapt external refstyle or prettyref definitions
and your own layout files.
BibTeX errors are now processed and cause LyX to show the errors dialog.
Before, these errors were ignored, which means that it may happen that
documents that compiled without error with a previous version now
compile with error. However, because now in 2.2.x users can click on
the "Show Output Anyway" button, the document can still be viewed.
Missing characters in the output are now reported as errors. This leads
to error reports for documents that compiled without error before.
However, the error was always present but went undetected!
Documents using Times fonts and containing Greek characters may now fail
to compile under pdflatex for users of MikTeX due to an automatically
half-installed "grtimes" package. A workaround in LyX was removed as it
stands in the way of alternative approaches (see bug #6469).
With LuaTeX, LyX now uses polyglossia instead of babel if the language
package option "Automatic" is selected. In order to use babel, select
"Always babel" instead. This may be needed if a document uses code that
is specific to babel.
* Upgrading from LyX 2.0.x:
Python version >=2.4 is now required.