Time for transaction

Time for transaction

Good day

I have a problem with the time span given when on a transaction for example if I must link the outstanding accounts handed over to a collector on the bank to the deposit.  I sometimes have like 40 payments to link and when I get to the end and want to save it throws me out and I have to start over again.  

Is there a way that you can give more time for the transaction before the system bombs out?