[TYPO3-english] Uncaught TYPO3 Exception

[Robert Wildling]

Hi,

On a TYPO3 4.6.6, under Protocolls, there are strange entries that read 
like this:

Core: Exception handler (WEB): Uncaught TYPO3 Exception: #1301648781: 
The requested page does not exist! | 
t3lib_error_http_PageNotFoundException thrown in file 
/www/htdocs/[---]/typo3/sysext/cms/tslib/class.tslib_fe.php in line 998. 
Requested URL: http://www.[---].at/&

I did not find any info on the number #1301648781, other similar google 
results talk about realurl misconfiguration - which is now turned of.

Can anybody help me how to procede to find out what the error reason 
could be? I have no idea how to search anymore...

Thank you!
Best regards,
Robert