Alarm acknowledgement fail

Hi guys, i have run into a bit of bother when acknowledging alarms. From the acknowledge button on the alarm status table, if i select a handful of messages it works okay. However when i attempt to group select all existing alarms (for example 500 alarms), it will display “alarm acknowledgement failed”. From the log on the gateway, it provides a bit more detail -
Manager - An alarm could not be acknowledged, it may no longer be registered.

A quick search online brought me to this Alarm could not be acknowledged. It may no longer be registered but the user was acknowledging through a custom script, i am just looking to use the standard function.

Hi Luke,

What Version are you using? Is this in Vision or Perspective?