Modify compressed file error

Hi. Does it normal getting error “Access Denied” when I try set compressed file like in this example:

.z.zd:(16;2;1)

`:g:/db/t/ set ( ti:09:30:00 09:30:01 09:30:02; p:33 33.5 33.2)

:g:/db/t/p set @[get :g:/db/t/p;1;:;42.]

\l g:/db

ps I can set to different temporary file, delete old file and rename temporary file to avoid error.

yes, that’s expected for the windows build.