Error when using 'rtwbuild'

I'm using rtwbuild to build model using a custom supplier target Virtual Aircraft Real-Time Target (Supplier S-Function)

The model consists of multiple nested buses which are defined and loaded prior to running 'rtwbuild' command. When I try to build, it throws up multiple errors w.r.t bus creators as seen below

Error using tlc_c (line 178)
    Erroneous feedback connection involving one or more virtual blocks starting at
    output port 1 of 'System/Platform I//O/Bus Selector1'

Error using tlc_c (line 178)
    Erroneous feedback connection involving one or more virtual blocks starting at
    output port 1 of 'System/Platform I//O/Bus Selector2'

I tried many proposed solutions like having a Unity Gain to break the continuity and renaming the signal before entering the bus creator etc...

Any insight would help

Thanks,