error calling function from plugin

Hello,

probably a basic one, but being a newbie :)

i call myfunction. On that function i�m trying to call a function from a plugin (in this case the bit plugin from yann) like Bit.And and always get the error that event trigger but function call ....

I only was able to call this using the plugin from rexrainbow function2 but being this a basic thing probably there is a simpler way.

Thanks

BRuno