Sounds like some kind of race condition between the cron scripts because it doesn't happen every time. Is there any chance the 3 cron scripts are dependent on each other in some way such as a file passed between or sharing a database. If there is any relationship between the cron scripts would it be possible to make a single script that just runs the 3 scripts sequentially and use that as your cron script. Do the scripts access the database and the database happens to be SQLite which locks for the duration of an access/
Without seeing some code and more details determining the cause is a guess. Ron
