In development environment I have SharePoint Workflow created in SharePoint Designer. This workflow using custom activity created in Visual Studio. After deployment web (Import-SPWeb Export-SPWeb) in production i've got error when tring to open my worklow within Designer.
Could not deserialize object. The type 'MyTypeHere' could not be resolved.
I've trying to reinstall solution and clear SharePoint Designer cache in application data. In workflow's xoml i specify right full namespace of my assembly with custom activity and this assembly exist in GAC.