This looks weird.
As far as I could see, reading preferences is done via
LyXRC::read(FileName const & filename, bool check_format)
which return true if everything is OK.
But if using '\input "some file"', we land at src/LyXRC.cpp:464
Changing as attached, cures it for me.
Kornel
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diff --git a/src/LyXRC.cpp b/src/LyXRC.cpp
index 27d5fcf..3a8328b 100644
--- a/src/LyXRC.cpp
+++ b/src/LyXRC.cpp
@@ -460,7 +460,7 @@ LyXRC::ReturnValues LyXRC::read(Lexer & lexrc, bool check_format)
FileName const tmp =
libFileSearch(string(),
lexrc.getString());
- if (read(tmp, check_format)) {
+ if (!read(tmp, check_format)) {
lexrc.printError(
"Error reading included file: " + tmp.absFileName());
}
