You receive WAMT0533E: An Appliance Management Protocol IO exception has been created during communication with the appliance when attempting to deploy a WebSphere DataPower firmware image to a device.
The problem is caused by the inability of the Appliance Management Protocol implementation in the existing firmware on the device to handle the deployment of firmware images that are larger than 136 MB when base64 encoded. For WebSphere DataPower firmware version 4.0.1 and later, some images exceed this limitation.
Resolving the problem
This issue is resolved for WebSphere DataPower firmware versions 22.214.171.124, 126.96.36.199, 188.8.131.52, 184.108.40.206, and later. One option is to deploy one of these versions first, and then move to desired version. For example, to move from version 220.127.116.11 to 18.104.22.168, deploy version 22.214.171.124 before deploying version 126.96.36.199. Alternatively, you can deploy the desired firmware version directly by using the device WebGUI or CLI.