Unknow process chain jobs keep failing

Hi

I have a problem with a process chain consisting of a number of local chains. Everyday two jobs (ODSACT and PROCESS_LOADING) fail. They are part of two separate local chains. If I go into the log of these local chains I can see unknown jobs corresponding to the failed jobs. I have experienced this problem before and solved it by de- and rescheduling the local chains and the main chain. In this case it doesn't work! Do you have any idea what to do. It is no big deal (as the process chain runs fine besides this) but it is somewhat of a nuisance.

Thanks

/Karsten