What is pout? Does such type or error is xcos and how to deal with xcos block debugging?

Undefined Function type

  "at block #11 "-7b20d29b:192a8d14135:-7ec9""              
  "unknown or erroneous block"                              
  "Xcos error:   Partial information in "pout(2)" is unset "
  "for Block #15 - "-7b20d29b:192a8d14135:-7ec1" : a value "
  "between 1 and 36 expected."   




System_IF.sci (4.8 KB)
System_SIM.sci (4.9 KB)
Can someone guide me with above error ?

This is my zcos file so can you please help me?
Only_kalman_filter_testing.zcos (4.4 KB)