Hi Anjan, this is my attribute setup:
constants: begin of c_bo_bus2105,
instid type sibfboriid value is initial,
typeid type sibftypeid value 'BUS2105',
catid type sibfcatid value 'BO',
end of c_bo_bus2105.
As per the blog, I have another attribute named BO_BUS2105 type 'SIBFLPORB' which has the initial value {my class]=>C_BO_BUS2105'
The class does not have any errors and is active.