No visitors & geolocation

Hello,
the last two days are no longer tracked visitors.

Entering the settings geolocation get this error:

v. 1.10.1 - php 5.4.11


Notice: Uninitialized string offset: 0 in C:\inetpub\website\statistiche\libs\MaxMindGeoIP\geoip.inc on line 627 

Backtrace -->

#0 Piwik_ErrorHandler(...) called at [C:\inetpub\website\statistiche\libs\MaxMindGeoIP\geoip.inc:627]
#1 _geoip_seek_country(...) called at [C:\inetpub\website\statistiche\libs\MaxMindGeoIP\geoip.inc:672]
#2 _get_org(...) called at [C:\inetpub\website\statistiche\libs\MaxMindGeoIP\geoip.inc:694]
#3 geoip_name_by_addr(...) called at [C:\inetpub\website\statistiche\libs\MaxMindGeoIP\geoip.inc:698]
#4 geoip_org_by_addr(...) called at [C:\inetpub\website\statistiche\plugins\UserCountry\LocationProvider\GeoIp\Php.php:149]
#5 Piwik_UserCountry_LocationProvider_GeoIp_Php->getLocation(...) called at [C:\inetpub\website\statistiche\plugins\UserCountry\LocationProvider\GeoIp.php:87]
#6 Piwik_UserCountry_LocationProvider_GeoIp->isWorking(...) called at [C:\inetpub\website\statistiche\plugins\UserCountry\LocationProvider\GeoIp\Php.php:201]
#7 Piwik_UserCountry_LocationProvider_GeoIp_Php->isWorking(...) called at [C:\inetpub\website\statistiche\plugins\UserCountry\LocationProvider.php:227]
#8 Piwik_UserCountry_LocationProvider::getAllProviderInfo(...) called at [C:\inetpub\website\statistiche\plugins\UserCountry\Controller.php:40]
#9 Piwik_UserCountry_Controller->adminIndex(...) called at [:]
#10 call_user_func_array(...) called at [C:\inetpub\website\statistiche\core\FrontController.php:138]
#11 Piwik_FrontController->dispatch(...) called at [C:\inetpub\website\statistiche\index.php:53]

have you setup automatic Geoip DB updates ? mabye your DB is corrupt. was it working before ?

[quote=matt]
have you setup automatic Geoip DB updates?[/quote]

yes.

[quote=matt]
mabye your DB is corrupt. [/quote]

no.

[quote=matt]
was it working before ?[/quote]

yes.

can you please take a screenshot of all the .dat files so I can see their sizes, date of last modified, etc. ?

Then try re-upload manually the Geoip.dat files. I suspect there was a problem during autoamtic download. We can try fix this issue and prevent such problem in the future, but I need the screenshot of your files to know the problem. cheers

Hi Cesar, can you check your piwik logs for any messages around the time the geoip files were last modified (06/02/2013 1.03)? Thanks.

NOTE: To get tracking working again, delete the GeoIPISP.dat file.