Question 500 Internal Server Error - because registry.php????

In the last days I started not to be able to access Kunena discutions because 500 Internal Server Error.

In the error.log it says: "PHP Fatal error: Cannot access empty property in /home/adlineso/public_html/libraries/joomla/registry/registry.php on line 320"

So I searched fixes and found to modify in registry.php the folowing lines:

// Traverse the registry to find the correct node for the result.
for ($i = 0, $n = count($nodes) - 1; $i < $n; $i++)
{
if (!isset($node->$nodes[$i]) && ($i != $n)) {
$node->$nodes[$i] = new stdClass;
}
$node = $node->$nodes[$i];
}


with:
// Traverse the registry to find the correct node for the result.
for ($i = 0, $n = count(nodes) - 1; $i < $n; $i++)
{
if (!isset($node->nodes[$i]) && ($i != $n)) {
$node->$nodes[$i] = new stdClass;
}
$node = $node->nodes[$i];
}

So I removed the first three $ following a ->

But I have no clue what is wrong and what is that I have done. Doing this I cannot modify modules in backend anymore. And the problem is only with Kunena. Kunena works fine without modifying registry, all until entering a category or discussion where it goes 505 Error.

G'day, costisefu, and thank you for your question.

The "fix" you suggest will not work. We're curious to know what has changed in your Joomla ../libraries/joomla/registry/registry.php and what you may have installed recently that has messed up your Joomla site.

We believe that a better solution would be to restore the original file from the Joomla installation package. If that does not work, please look at the posting guide printed above. We cannot eliminate any specific causes of your problem at this time until we know more.

I restored registry.php and also made an update of both joomla and kunena trying to fix the problem.

Database collation check: The collation of your table fields are correct

Legacy mode: Disabled | Joomla! SEF: Enabled | Joomla! SEF rewrite: Disabled | FTP layer: Enabled |

This message contains confidential information

htaccess: Exists | PHP environment: Max execution time: 30 seconds | Max execution memory: 256M | Max file upload: 64M

Joomla default template details : ja_portfolio | author: JoomlArt.com | version: 1.2.0 | creationdate: August 2011

Kunena default template details : Blue Eagle (default) | author: Kunena Team | version: 1.7.1 | creationdate: 2011-11-16

Kunena version detailled: Installed version: 1.7.1 | Build: 5162 | Version name: UnderUret | Kunena detailled configuration:

Warning: Spoiler!

[th]Kunena config settings:[/th]

board_offline	0
board_ofset	0.00
enablerss	1
enablepdf	1
threads_per_page	30
messages_per_page	20
messages_per_page_search	100
showhistory	1
historylimit	20
shownew	1
jmambot	0
disemoticons	0
template	default
showannouncement	1
avataroncat	0
catimagepath	category_images/
showchildcaticon	1
annmodid	62
rtewidth	450
rteheight	300
enableforumjump	1
reportmsg	1
username	1
askemail	0
showemail	0
showuserstats	1
showkarma	1
useredit	1
useredittime	0
useredittimegrace	600
editmarkup	1
allowsubscriptions	1
subscriptionschecked	1
allowfavorites	1
maxsubject	90
maxsig	300
regonly	0
changename	0
pubwrite	1
floodprotection	0
mailmod	0
mailadmin	0
captcha	1
mailfull	1
allowavatar	1
allowavatarupload	1
allowavatargallery	1
avatarquality	65
avatarsize	2048
allowimageupload	0
allowimageregupload	1
imageheight	800
imagewidth	800
imagesize	2000
allowfileupload	0
allowfileregupload	1
filetypes	txt,rtf,pdf,zip,tar.gz,tgz,tar.bz2
filesize	2000
showranking	1
rankimages	1
avatar_src	fb
fb_profile	fb
pm_component	no
userlist_rows	30
userlist_online	1
userlist_avatar	1
userlist_name	1
userlist_username	1
userlist_posts	1
userlist_karma	1
userlist_email	0
userlist_usertype	0
userlist_joindate	1
userlist_lastvisitdate	1
userlist_userhits	1
latestcategory
showstats	1
showwhoisonline	1
showgenstats	1
showpopuserstats	1
popusercount	5
showpopsubjectstats	1
popsubjectcount	20
usernamechange	0
rules_infb	1
rules_cid	1
help_infb	1
help_cid	1
showspoilertag	1
showvideotag	1
showebaytag	1
trimlongurls	1
trimlongurlsfront	40
trimlongurlsback	20
autoembedyoutube	1
autoembedebay	1
ebaylanguagecode	en-us
fbsessiontimeout	1800
highlightcode	0
rss_type	topic
rss_timelimit	month
rss_limit	100
rss_included_categories
rss_excluded_categories
rss_specification	rss2.0
rss_allow_html	1
rss_author_format	name
rss_author_in_title	1
rss_word_count	0
rss_old_titles	1
rss_cache	900
fbdefaultpage	recent
default_sort	asc
alphauserpointsnumchars	0
sef	1
sefcats	0
sefutf8	0
showimgforguest	1
showfileforguest	1
pollnboptions	4
pollallowvoteone	1
pollenabled	1
poppollscount	5
showpoppollstats	1
polltimebtvotes	00:15:00
pollnbvotesbyuser	100
pollresultsuserslist	1
maxpersotext	50
ordering_system	mesid
post_dateformat	ago
post_dateformat_hover	datetime
hide_ip	1
js_actstr_integration	0
imagetypes	jpg,jpeg,gif,png
checkmimetypes	1
imagemimetypes	image/jpeg,image/jpg,image/gif,image/png
imagequality	50
thumbheight	32
thumbwidth	32
hideuserprofileinfo	put_empty
integration_access	auto
integration_login	auto
integration_avatar	auto
integration_profile	auto
integration_private	auto
integration_activity	auto
boxghostmessage	0
userdeletetmessage	0
latestcategory_in	1
topicicons	1
onlineusers	1
debug	0
catsautosubscribed	0
showbannedreason	0
version_check	1
showthankyou	1
showpopthankyoustats	1
popthankscount	5
mod_see_deleted	0
bbcode_img_secure	text
listcat_show_moderators	1
lightbox	1
activity_limit	0
show_list_time	720
show_session_type	0
show_session_starttime	0
userlist_allowed	0
userlist_count_users	1
enable_threaded_layouts	0
category_subscriptions	post
topic_subscriptions	every
pubprofile	1
thankyou_max	10
email_recipient_count	0
email_recipient_privacy	bcc
email_visible_address
captcha_post_limit	0

Third-party components: None

Third-party SEF components: None

Plugins: System - Mootools Upgrade: Disabled | System - Mootools12: Disabled

Modules: Kunena Latest 1.7.0

I doupt that this is Kunena problem -- what did you do when plugin stopped to work?

This same thing is happening to me. What was the fix? I tried replacing the registry.php file from a fresh download and it didn't fix the error.

The error doesn't happen right away. Only once I click on one of the tab links (Open New Ticket, View Open, View Closed, etc.).

I have Joomla 1.7.

Please see msg #2 above. The advice I gave in that message also applies to you.