Find epoch timestamp of Accurev file in my stream OR backing stream?

Find epoch timestamp of Accurev file in my stream OR backing stream?

I'm trying to find the epoch timestamp of whatever version of a file I get
in my stream.
I tried "accurev hist -s stream_name -fx -t highest filename"
That only seems to work if the filename is in the default group of
stream_name. If stream_name inherits the file from a higher stream, I see
"No history corresponding to selection."
I also tried "accurev stat -s stream_name -fe filename" to get the EID,
and then used "-e EID" in the "accurev hist" command. Again, this only
works if the file is in the default group of stream_name, otherwise I get
"No history corresponding to selection."
How can I get the timestamp regardless of whether the file is in my
default group or in the default group of a parent stream?
Thanks.