InternalError

Exception: Cache_Lite : Unable to write cache !
#0 /var/www/includes/prado-cvs/framework/I18N/core/TCache_Lite.php(578): TCache_Lite->raiseError('Cache_Lite : Un...', -1)
#1 /var/www/includes/prado-cvs/framework/I18N/core/TCache_Lite.php(592): TCache_Lite->_write('a:102:{s:7:"deu...')
#2 /var/www/includes/prado-cvs/framework/I18N/core/TCache_Lite.php(329): TCache_Lite->_writeAndControl('a:102:{s:7:"deu...')
#3 /var/www/includes/prado-cvs/framework/I18N/core/MessageCache.php(147): TCache_Lite->save(Array, 'de/messages.xml...', 'de/messages.xml...')
#4 /var/www/includes/prado-cvs/framework/I18N/core/MessageSource.php(201): MessageCache->save(Array, 'de/messages.xml', 'de_DE')
#5 /var/www/includes/prado-cvs/framework/I18N/core/MessageFormat.php(141): MessageSource->load('messages')
#6 /var/www/includes/prado-cvs/framework/I18N/core/MessageFormat.php(186): MessageFormat->loadCatalogue('messages')
#7 /var/www/includes/prado-cvs/framework/I18N/core/MessageFormat.php(164): MessageFormat->formatString('home', Array, '')
#8 /var/www/includes/prado-cvs/framework/I18N/TTranslate.php(239): MessageFormat->format('home', Array, '', 'UTF-8')
#9 /var/www/includes/prado-cvs/framework/Web/UI/TControl.php(563): TTranslate->renderBody()
#10 /var/www/includes/prado-cvs/framework/Web/UI/TControl.php(597): TControl->render()
#11 /var/www/includes/prado-cvs/framework/Web/UI/TForm.php(101): TControl->renderBody()
#12 /var/www/includes/prado-cvs/framework/Web/UI/TPage.php(1126): TForm->render()
#13 /var/www/includes/prado-cvs/framework/Web/UI/TControl.php(563): TPage->renderBody()
#14 /var/www/includes/prado-cvs/framework/Web/UI/TPage.php(1086): TControl->render()
#15 /var/www/includes/prado-cvs/framework/Web/UI/TPage.php(1094): TPage->renderContent()
#16 /var/www/includes/prado-cvs/framework/Web/UI/TPage.php(1041): TPage->renderContent()
#17 /var/www/includes/prado-cvs/framework/Web/Services/TCallbackPage.php(217): TPage->execute()
#18 /var/www/includes/prado-cvs/framework/TApplication.php(483): TCallbackPage->execute()
#19 /var/www/clients/client19/web45/web/index.php(32): TApplication->run()
#20 {main}