Time limit for a load

Hi,

I would like to know if someone has faced a problem like the one we do now.

We're required to stop our data loads at a specific time even if they didn't conclude, to be sure that at that time system won't be overloaded.

My question is: is it possible on SAP to establish a time limit for a job that generates its own cancellation? (like, for instance, filling in the setup tables on R/3 LIS extractors).

Any workarounds? Please, consider usual ways of loading on BW (for instance, a process chain, an infopackage...)

Thanks and best regards,

David.