› Forums › MyID knowledge base › MY0399 MyID Windows Client Error -2146434964 Tagged: Windows Client Error This topic is empty. Viewing 1 post (of 1 total) Author Posts 26th May 2020 at 4:03 pm #3426 MyID SupportKeymaster Error Code -2146434964 Text Device has an unknown Security Officer PIN Details There has been a failure in attempting to change the SOPIN on the card. This may be because the maximum number of PIN attempts have been exceeded. Solution Contact your administrator. Author Posts Viewing 1 post (of 1 total) The forum ‘MyID knowledge base’ is closed to new topics and replies.