[GRASSLIST:581] vertex limit v.in.shape

[javier garcia - CEBAS]

Hi;
I'm using vin.shape, and, among others errors I've got one. The message is 
something like:
---------------------------------------------------------------
'polygon with more than 50000 vertex'
'consider incrementing vertex limit'

Does anyone know how to do this?
Should I alter the code?

Please, help!

Thanks 

Javier