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Wow, sorry for so large printscreens, I expected forum software to resize them automatically.

It's because you've added it as html instead of using the forum editor 'image' option. If you did, you would be able to easily resize it to 700px wide.

Paul

ChuliaLT, can you see any files created in /var/lib/phpfina  or /var/lib/phpfiwa? did you set the permissions for these folders

sudo chown www-data:root /var/lib/phpfiwa
sudo chown www-data:root /var/lib/phpfina
sudo chown www-data:root /var/lib/phptimeseries
 

Yes, all permissions are set to 777.

Inside folders there are no files, although they're all created in root "emoncmsdata" folder:

I've just tried adding trailing slash in settings file ( '../emoncmsdata/phpfina/' instead of '../emoncmsdata/phpfina' ) - the files are now created inside the folders - although the problem remains unsolved.

Ok sounds like progress, In your browser when your logged in try for example:

http://192.168.1.70/emoncms/feed/getmeta.json?id=5

that should return something like
{"interval":60,"start_time":1378304820}
 

or hopefully an error that we can use to debug if not.

I think you've forgot "Modules/" in path.

So when I check http://www.sich.lt/emoncms/Modules/feed/getmeta.json?id=57 while logged in, it spits out only this, same for all feed ids:

OK, this is what it returns now:

Warning: Wrong parameter count for clearstatcache() in /var/www/vhosts/sich.lt/httpdocs/emoncms/Modules/feed/engine/PHPFina.php on line 357
{"interval":15,"start_time":1423738860,"npoints":325109}

Any ideas how I should proceed from here?

Got it.

clearstatcache() function in php only accepts arguments from version 5.3. My server runs 5.2.19. I've changed clearstatcache($this->dir.$meta->id."_$i.dat"); to simply clearstatcache(); everywhere and hope it won't show any problems.

Dashboard, visualisations, etc - everything seems to work normaly now.