[TYPO3-project-seminars] Fatal Error - after upgrading to 0.7.1

[David E.]

Hi all,

after i´ve upgraded seminars from 0.7.0 to 0.7.1. the Seminarlist throws 
following:

Fatal error: Uncaught exception 'Exception' with message 'There was an 
error with the database query.' in 
/html/typo3conf/ext/seminars/class.tx_seminars_bag.php:239 Stack trace: 
#0 /html/typo3conf/ext/seminars/class.tx_seminars_bag.php(159): 
tx_seminars_bag->rewind() #1 
/html/typo3conf/ext/seminars/class.tx_seminars_seminarbag.php(73): 
tx_seminars_bag->__construct('tx_seminars_sem...', 'tx_seminars_sem...', 
'', '', '(SELECT MIN(tx_...', '0,20', -1, false) #2 
/html/typo3conf/ext/seminars/class.tx_seminars_bagbuilder.php(112): 
tx_seminars_seminarbag->__construct('tx_seminars_sem...', '', '', 
'(SELECT MIN(tx_...', '0,20', -1, false) #3 
/html/typo3conf/ext/seminars/pi1/class.tx_seminars_pi1.php(1716): 
tx_seminars_bagbuilder->build() #4 
/html/typo3conf/ext/seminars/pi1/class.tx_seminars_pi1.php(1584): 
tx_seminars_pi1->initListView('seminar_list') #5 
/html/typo3conf/ext/seminars/pi1/class.tx_seminars_pi1.php(346): 
tx_seminars_pi1->createListView('seminar_list') #6 [internal function]: 
tx_seminars_pi1->main('', Array) #7 /typo3_ in 
/html/typo3conf/ext/seminars/class.tx_seminars_bag.php on line 239

Other Extensions i´m running : oelib 0.5.1, formidable 1.1.0., 
onetimeaccount 0.3.0 (TYPO3 ver. 4.2.3)

Anyone any hint? did i forget to set any value somewhere? Anything else 
I could have forgotten?

Best Regards from sunny Berlin!
David