FIX: issue of not being able to remove processes due to getting stuck…

… whe calling remote_do function

src/core/base.jl

@@ -853,6 +853,9 @@ function solve_model(
         # Force call Garbage collector to reduce RAM usage
         GC.gc()
 
+        # Remove Processes
+        Distributed.rmprocs(Distributed.workers())
+
     elseif (typeof(optimizer) == _SDO.MultiThreadOptimizer)
 
         # Instantiate the Decomposition PowerModelsITD object.

src/core/multiprocessing.jl

@@ -25,6 +25,8 @@ function optimize_subproblem_multiprocessing(
     export_models::Bool=false
 )
 
+    @info "Enter optimize_subproblem_multiprocessing() function"
+
     # Instantiate the PMD model
     subproblem_instantiated = _IM.instantiate_model(data,
                                     type,
@@ -84,6 +86,13 @@ function optimize_subproblem_multiprocessing(
     close(mp_string_rc)
     close(sp_string_rc)
 
+    # Clear references to help the garbage collector
+    subproblem_instantiated = nothing
+    subprob_linking_vars_vector = nothing
+    result = nothing
+    result_json = nothing
+    data = nothing
+
     # Clean everything before leaving process
     GC.gc()