Warlock invocation retraining

[Overshee]

The Warlock Handbook (http://brilliantgameologists.com/boards/index.php?topic=2915) seems to suggest that a warlock is somehow able to retrain his invocations as he levels up, but I can't find any evidence to support this in Complete Arcane, where the class is located.

Am I being obtuse/blind or is the handbook misleading? I was planning to pretty much copy this build:


Warlock 1: Point Blank Shot, (Precise Shot)
Warlock 3: Ability Focus (Eldritch Blast)
Warlock 6: Spell Penetration
Warlock 9: Maximize Spell-like Ability (Eldritch Blast)
Warlock12: Sudden Still
Warlock15: Greater Spell Penetration*
Warlock18: Extra Invocation

Least Invocations ( ---> denotes a switch in Invocations, if there is no note for when, assume ASAP)

*Spiderwalk ---> See the Unseen (When you get Fell Flight)
*Sickening Blast ---> Beguiling Influance
*Entropic Warding

*Lesser Invocations

*Eldritch Chain
*Beshadowed Blast ---> Voracious Dispelling
*Fell Flight

*Greater Invocations

*Vitriolic Blast
*Noxious Blast
*Chilling Tentacles
*Eldritch Cone (Through Extra Invocation)

*Dark Invocations

*Utterdark Blast
*Eldritch Doom
*Path of Shadows


When do those switches occur?

[Medic!]

Complete Arcane, page 7, right hand side, 2nd indent:

At any level when a warlock learns a new invocation,
he can also replace an invocation he already knows with
another invocation of the same or a lower grade. At 6th
level, a warlock can replace a least invocation he knows
with a different least invocation (in addition to learning a
new invocation, which could be either least or lesser). At
11th level, a warlock can replace a least or lesser invocation
he knows with another invocation of the same or a lower
grade (in addition to learning a new invocation, which
could be least, lesser, or greater). At 16th level, a warlock
can replace a least, lesser, or greater invocation he knows
with another invocation of the same or a lower grade (in
addition to learning a new invocation, which could be least,
lesser, greater, or dark).

[lokoone]

he can replace one invocation he knows with another one of the same or lower grade everytime he learn a new invocation.

its on the class features, invocations 4th paragraph

edit: swordsage'd :smallredface:

[Overshee]

OK then, I'm just blind. Thanks guys!

[Psyren]

You can also arguably retrain your whole list by UMD'ing an item of Limited Wish to get Psychic Reformation.