Updating documents in library batch wise using ecmascript

Hi All,

I am using emca script to update multiple library items. I am doing it in batch of 100.

Problem is that when update of any item(lets say 50th item) in this batch fails , first 49 items are updated and next all items are not.Also failure message that we get in ecma does not specify at which item it failed.

Is there any way, like if anything fails nothing is updated or all other items are updated except for ones which fail?