Does anyone know what a polyform is?

[Senko]

So my character portrait has just started generating a whole bunch of errors linked to this polyform which I think has something to do with my familiar.

Some examples . . .

Attempt to access non-live container via script fails for container 'PolyForm' Location:'eval script for Component 'BaseRace' (Eval Script 'Generate Hero.HitDice tags for races') near line 4
...
Attempt to access non-live container via script fails for container 'PolyForm' Location:'field calculate script for Field 'CIndexMod' near line 15
...
Attempt to access non-live container via script fails for container 'PolyForm' Location:'eval script for Component 'BaseRace' (Eval Script 'Racia HD Processing') near line 4

there's about a dozen of them all linked to this polyform thing so does anyone know what it is?