diff --git a/app/models/custom_workflow.rb b/app/models/custom_workflow.rb
index 1e315c7..406a6e4 100644
--- a/app/models/custom_workflow.rb
+++ b/app/models/custom_workflow.rb
@@ -96,7 +96,7 @@ class CustomWorkflow < ActiveRecord::Base
     true
   rescue RedmineCustomWorkflows::Errors::WorkflowError => e
     Rails.logger.info "== User workflow error: #{e.message}"
-    object.errors.add :base, e.error
+    object.errors.add :base, e.message
     false
   rescue Exception => e
     Rails.logger.error "== Custom workflow exception: #{e.message}\n #{e.backtrace.join("\n ")}"
diff --git a/lib/redmine_custom_workflows/errors/workflow_error.rb b/lib/redmine_custom_workflows/errors/workflow_error.rb
index 04e105b..646ce95 100644
--- a/lib/redmine_custom_workflows/errors/workflow_error.rb
+++ b/lib/redmine_custom_workflows/errors/workflow_error.rb
@@ -24,12 +24,8 @@ module RedmineCustomWorkflows
   module Errors
 
     class WorkflowError < StandardError
-      attr_accessor :error
 
-      def initialize(message)
-        @error = message
-        super message
-      end
     end
+
   end
 end