Pinterp after pcompos or pcomb

Dear Greg,

Thank you for your reply. It helped me to understand some things. However I might use it incorrectly. Let’s say my hdr file is called “output3.hdr”. This file was obtained by using pcomb, pcompos and pfilt on the original file : “input.hdr”.
Then, I wrote :
“getinfo -a “VIEW= -vta -vh 180 -vv 180” < output3.hdr > output4.hdr
Where “output4.hdr” is the new file which will contains output3.hdr information and the new one I just added. Well, that is what I thought but instead, the only response I get for “getinfo output4.hdr” is:
-a cannot open
VIEW= -vta -vh 180 -vv 180: cannot open

I think I misunderstood your first reply. Could you give me some more hints ?

Thank you in advance

Best regards

Wirich