[Okular-devel] Pdf files not opening

[Pulkit Gupta]

Hello sir,
I have good knowledge of C++ and Qt, so I wanted to contribute and
develop Okular. I was able to build and install Okular from the
source, but whenever I open it, it is not able to show any pdf files.
When opening Okular in Command prompt, it shows

okular(8747)/kdecore (trader) KServiceTypeTrader::defaultOffers:
KServiceTypeTrader: serviceType  "okular/Generator"  not found

And when I select a pdf file, it shows

okular(8747)/kdecore (trader): KMimeTypeTrader: couldn't find service
type "okular/Generator"
Please ensure that the .desktop file for it is installed; then run
kbuildsycoca4.
okular(8747)/okular (app) Okular::Document::openDocument: No plugin
for mimetype '"application/pdf"'.

I have tried to build and install Okular both in ubuntu and Kubuntu. I
also ran kbuildsycoca4 --noincremental command, but it didn't help. I
can see a okularGenerator.desktop file in
/home/pulkit/Okular/install/share/kde4/servicetypes, but still this
error comes. Also, if I install Okular from Ubuntu software center or
from Muon, then that works perfectly well but if I build and install
it from source, it doesn't work. Please help, I really want to start
developing for Okular.

Thanking you,
Pulkit