diff --git a/src/learn.jl b/src/learn.jl
index 52f8f3e..3410723 100644
--- a/src/learn.jl
+++ b/src/learn.jl
@@ -60,6 +60,7 @@ function compute_paramsChange!(kfn::kfn_1, modelError::CuArray, outputError::CuA
                            kfn.on_wOutChange,
                            kfn.on_arrayProjection4d,
                            kfn.on_error,
+                           kfn.on_synapticActivityCounter,
                            outputError,
                            )
     # error("DEBUG ->  kfn compute_paramsChange!    $(Dates.now())")
@@ -181,6 +182,7 @@ function onComputeParamsChange!(phi::CuArray,
                                 wOutChange::CuArray,
                                 arrayProjection4d::CuArray,
                                 nError::CuArray,
+                                synapticActivityCounter,
                                 outputError::CuArray    # outputError is output neuron's error
                                 )