compile failed error: extracted in the parser but are not referenced in the deparser

[Abhishek Dixit]

I am trying to use header stack in p4 on netronome smartNIC. When i parse the elements index-wise in the parser, I get the following error:
"compile failed error: Header(s) ['patrns[0]', 'patrns[15]', 'patrns[2]', 'patrns[14]', 'patrns[1]', 'patrns[7]', 'patrns[10]', 'patrns[5]', 'patrns[13]', 'patrns[11]', 'patrns[12]', 'patrns[3]', 'patrns[8]', 'patrns[6]', 'patrns[4]', 'patrns[9]'] extracted in the parser but are not referenced in the deparser"
Can anyone please help me with this?

[Abhishek Dixit]

I tried to emit the header components (like ipv4, tcp, udp) individually and even each of the elements of the header stack individually using their indices, but still, this error persists.