I am using Version 6.5

Ah!

Maybe it's new to 6.5

Thanks for the suggestion anyway. Is there anything else I can try. I can't beleive it would be built without taking this scenerio into account and making it manageable.

Ideally, It would be good to have an option to say if it fails a number of times in a row, then disable the schedule altogether!

Why don't you just upgrade? All I did was to download it and install it over my 6.1 and it upgraded it without any problems. All my old schedules worked as before.

I think our support has expired. I assume this will have an impact on upgrades.

Looks like it is a new feature.

Taken from the CRD website

- Event-Based Schedules: User can specify a set of "Operational Hours". The schedule will only run during these hours.