https://aveva.dev-verintcommunity.com/cfs-file/__key/communityserver-discussions-components-files/1605/240800aphRevisionMark.pmlfrm
Try to reload the form by command: PML RELOAD FORM !!APHREVISIONMARK
Command to show the form: SHOW !!APHREVISIONMARK
I have notice that you are using PDMS 11.6, I may not sure that all the macro code is compatible with the version you are using. Just try then post the error if you will encounter it.