Adobe reader plugin was not listed in plugins

So this is a NPAPI plugin and, therefore, will not work in Opera.

I have pdf chrome plugin was installed and I tried to disable it

Let it enabled as you will need it to view PDF files inside Opera.

Yes, I have enabled, but the problem still exists.

Ya I have adobe reader installed

Is the plugin listed in opera://plugins? if so, try to disable it. Or disable Opera's one.

Adobe reader plugin was not listed in plugins, and I have pdf chrome plugin was installed and I tried to disable it and enable it but of no use. The error I am getting is "couldn't load plugin" is for only few pdf's. Couldn't figure the problem. In the plugins section of chrome pdf, there are to types. One is browser plugin and the other is PPAPI(internal pdf viewer). I tried to disable the PPAPI, then the pdf file says to enable, when I enable the plugin again, then the pdf file opens. But when I refreshed the pdf file, the problem arises again.

Do you have any pdf reader plugin installed? I mean, other that Opera's pre-installed one.

Ya I have adobe reader installed and only few pdf files were not opening which are opening in chrome

PDF is not Flash. What version of Opera, and on what OS?

Version information

Version: 38.0.2220.31 - Opera is up to date
Update stream: Stable
System: Windows 10 64-bit (WoW64)

Hi Iam using opera and it was a great experience. I am facing issues with some of the pdf files. I am getting error "could't load plugin". I have installed flash player and flash player was enabled.
Thank You,
Prashaant