Editing Tag Attribute AECOsim Building Designer V8i (SELECTseries 5)

Issue:

i am trying to find command to delete specific attribute and another command to add specific attribute on a specific Tag set for more than 100 files (it will take alot of time if i open file by file and make these editing in each file)

i use record macro but i cant found the command of deleting attribute or adding attribute 

this is the command to open tag set (CadInputQueue.SendKeyin "MDL SILENTLOAD TAGS DEFINE")

can any one help me ?

the below two picture to illustrate what i want.