FormAPI getChildren() on replicant returns null

System

If you have a replicant that allows zero instances, if the user does not create an instance of the replicant, getChildren() will return null. If you try to access the length property (to determine the number of instances), your code will fail. This can be pretty confusing if you have an onSave trigger that tries to do something to all of the instances - it won't save and may not even give an error message. So you have to first check that getChildren() does not return null before you check the length property.

if ( IWDatacapture.getItem( "/Replicant" ).getChildren() != null )
{
for( i = 0 ; i < IWDatacapture.getItem( "/Replicant" ).getChildren().length ; i++ )
{
// do your thing
}
}