B_xx.ChangeNo = NumberSeq::newGetNum(custParameters:: numRefRMARequestNo()).num();
When wanting to clear dynalinks between two forms, you can clear the dynalinks on the DS on the second form. See example below.
Clear DynaLinks public void init() { ; super(); if (element.args() && element.args().caller() && (element.args().caller().name() == formStr (PurchTable))) { InventTable_ds.query().dataSourceTable(tableNum(InventTable)).clearDynalinks(); } }