B4J Question Javafx Scene Builder

Hi all,

We have an old project that still uses Javafx Scene Builder, even upgraded to the latest Gluon Scene Builder but am still getting the error (An error occurred. Index out of range. Must be non-negative and less than the size of the collection. Parameter name: index) this happens when I try and generate members. I have the latest version of B4J, does the latest B4J not support the generate members, can't seem to find the issue. I know that JavaFx Scene Builder is depreciated but there is no easy way to port all the forms over to the internal designer. Any help will be much appreciated. Thank you