Monday 05 May 2008 11:39:17 am

This is just a pure guess, cause I have never touched that part directly, but maybe this would be a hint. This transaction error seems like a common message also for situations, when you try to carry out an operation that would clearly violate database rules, for example reinsert the same value for a primary key or a unique key. Now, looking at your example, this could be happening (knowing that publication should always create a new version)... I would inspect all the operations to see what is happening, and compare that to the db table state...

include_once('lib/ezutils/classes/ezoperationhandler.php');
$operationResult = eZOperationHandler::execute('content', 'publish', array( 'object_id' => $object->attribute( 'id' ), 'version' => $object->attribute('current_version' ) ) ); 

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