getting error importing key

when i make my own keys and send messages from one computer to another in my house it works but i get this error trying to import a friends key.

import failed
gpg: invalid radix64 character 3A skipped

gpg: invalid radix64 character 2E skipped

gpg: invalid radix64 character 2E skipped

gpg: invalid radix64 character 28 skipped

gpg: invalid radix64 character 29 skipped

gpg: CRC error; A31868 - 8AD0C2

gpg: [don't know]: invalid packet (ctb=55)

gpg: read_block: read error: invalid packet

gpg: import from `[stdin]' failed: invalid keyring

[GNUPG:] IMPORT_RES 0 0 0 0 0 0 0 0 0 0 0 0 0 0