[hamagc]

a cap file is a Generic Network Capture Document.

i'm sure on our phones, cap files could be associated with opera. if i'm not mistaken though i think cap files are usually used with wireless capture programs like airodump and such. wireless network hacking.

unless i'm just reading this all wrong and you meant to say cab not cap?

i'm with capsyze on this, it sounds like your trying to install a file but it's not a cab file, something like a zip or a rar file. possibly not even one of those.

if you can post the file in question, we would be able to better assist you.