B4J Question Problem with B4RSerializator

Hi there.

Been a long time since I've used the B4X stuff... wow has it come on a long way!

Anyway.

I am playing with an ESP board and have managed to get the demo code from the ESP8266 Getting Started Tutorial running in B4R. However, when I run the server code in B4J, I get a

Private ser As B4RSerializator - unkown library error.

I note that in B4R, the rRandomAccessFile library is at v1.60 and this works ok.

However, in B4J, the jRandomAccessFile library is at v2.20 and this does not appear to give me the B4RSerializator type access.

Can anyone point me in the right direction? I am clearly not enabling the right library in B4J...

Thanks!

JMB