extending MLPPI tables - response (3) by dnoeth

Before TD14 there's a specific rule for changing the definition of sub-partitions on a populated table:
You can only add a partition when you also drop a partition, i.e. the number of partitions must not change. 
In TD!4 there's a new ADD option to keep some additional partitions available.
I usually recommend to define as far into the future as possible/neccessary, so you never have to ADD/DROP again :-)