Lyx/emulateapj.cls

[Klaus lang]

Hello,
new to Lyx and the whole Tex-world I tried to import a certain kind of
tex-files from Astro-ph to Lyx to convert them to html for private use
but failed.
.

21:02:24.543: Cannot read layout file `'.
21:02:24.543: Error reading `'
21:02:24.543: (Check `emulateapj')
21:02:24.543: Check your installation and try Options/Reconfigure...
21:02:24.543: Error: Could not read layout file for textclass
"emulateapj".
Running: tex2lyx -f "Nayyeri_etal_2014.tex" "Nayyeri_etal_2014.lyx"
support/Systemcall.cpp (273): Systemcall: 'tex2lyx -f
"Nayyeri_etal_2014.tex" "Nayyeri_etal_2014.lyx"' finished with exit code 1
Error: Die Datei kann nicht konvertiert werden
----------------------------------------
Bei der Ausführung von
tex2lyx -f "Nayyeri_etal_2014.tex" "Nayyeri_etal_2014.lyx"
ist ein Fehler aufgetreten
21:02:36.316: Datei wurde nicht importiert!

Is this an error caused by my Miktex-configuration? The package is
obviously installed by the Myktex Package manager.
So, why Lyx cannot read this file, are there different versions (I suppose)?
Do I have to install/uninstall other packages?
Kind regards from Germany
Klaus Lang