diff --git a/src/SystemIdentification.jl b/src/SystemIdentification.jl
index 053144ecd5189ce014b8740c3a7c7799afc52f84..0fb42e33025c1ddcb37c742dd8005c13dccfea4d 100644
--- a/src/SystemIdentification.jl
+++ b/src/SystemIdentification.jl
@@ -1,5 +1,5 @@
 module SystemIdentification
-if !isdefined(:DEBUG); DEBUG = false; end
+
 export
 Model,LinearModel,NonLinearModel,
 Network,
@@ -110,10 +110,12 @@ aic(x,d) = log(sse(x)) + 2d/length(x)
 Base.show(fit::FitStatistics) = println("Fit RMS:$(fit.RMS), FIT:$(fit.FIT), AIC:$(fit.AIC)")
 
 
+include("utilities")
+include("transfer_functions")
+include("idinput")
 include("armax.jl")
 include("kalman.jl")
 include("PCA.jl")
-# include("kernelPCA.jl")
-include("toeplitz.jl")
+include("cuckooSearch.jl")
 
 end