Hi all,
I have a file on which I am currently working. It compiled fine under lyx
2.2.1.
Today I upgraded to lyx 2.2.2 and compiling the very same file results in
an error which I previously didn't experience.
The error is as follows:
-------------------------------------------------
Undefined control sequence
Let $\sigma\left(f\right)\coloneqq
f\left(x_{\sigma\left(1\right)}...
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.
--------------------------------------------------
In other words, the control sequence \coloneqq which was previously known
to lyx, is not known any longer.
What is happening?
TIA
