Hello everyone,

I'm new to Pharo and have tried do example with structure in Unified FFI manual.

FFIExternalStructure subclass: #MyStructure
instanceVariableNames: ''
classVariableNames: ''
package: 'FFIDemo'

MyStructure class>>#fieldsDesc
^ #(
uint8 id;
char * struct_name;
uint name_length;
)

MyStructure rebuildFieldAccessors . -> DoIt -> MessageNotUnderstood

What's i do wrong?

I do it in

Pharo5 and 6, widows and os x.

Sorry for my english, it's not my native language.