[tex-live] Class scrartcl Error: undefined old font command '\it' and '\rm'

[Michael Berger]

Hi all,
I am new to this list.
I am heavily engaged in writing linguistic and engineering papers.
I have Mageia5 x86:64  KDE which runs so far without any problems using 
texlive2013 and Lyx 2.1., both as standard installations using Mageia's 
software manger.

Going for new features and latest improvements of LyX and KOMA I 
installed texlive2016 GUI and Lyx 2.2.0
Now I am facing various problems, most annoying the one as per 'subject'.

The mini file attached compiles if I add 'enabledeprecatedfontcommands' 
in Class options > Custom.
This option works for the mini example with no no complaint although it 
is also already deprecated.
However, using this very option in other (more complex) documents 
returns errors and plenty of warnings.

Members of the lyx users lists could not help.
Some suspect a conflict with the covington package, and of course in all 
my documents the module 'linguistics' is loaded.
But now that I am addressing the 'real TeXers' hope comes up!
(I am just an ordinary user!)

Please, is somebody out there to resolve this?

Thanks and cheers,
Michael

PS: the error occurs with both TL2013/LyX2.1 and TL2016/LyX 2.2.0 as well
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