Uploading the System Image SGOS on ProxySG or ASG failed with the error '% All system image slots in use'.

Products

• ProxySG Software - SGOS
• Advanced Secure Gateway Software - ASG

Issue/Introduction

Uploading the system image on ProxySG or ASG failed with the error '% All system image slots in use'.

ProxySG#(config)upgrade-path 
  ok
ProxySG#(config)exit https://<download URL/ProxySG_7.3.6.1-266990.bcsi>
ProxySG#load upgrade
  Downloading from "https://<download URL/ProxySG_7.3.6.1-266990.bcsi>"
% All system image slots in use

Cause

The SGOS system version to be replaced is not selected. 

Resolution

To resolve this issue select the SGOS version to be replaced under ProxySG or ASG Management Console > Maintenance > Upgrade > Systems and then re-attempt to upload the system image in question