I meant "seed phrase", the word mnemonic used to recover a wallet. It is a Brainwallet using a set of words that are in the 2048-word list -->
-snip-
It's not a pure Brainwallet of self-selected, non-list verified words.
"
Brainwallet" is a different thing, it's basically a SHA-256 sum of the "
passphrase" that will be used as a private key.
Based from your reply, it can not be a Brainwallet.
I'm able to import a seed mnemonic from a wallet created with a random set of words derived from the old format, like "black brown red green black brown red green black brown red green".
-snip-
Perhaps my final word does not compute a proper checksum. (?)
Random picked words from the old wordlist works because there's currently no "
seed version system" before v2 (
link).
I've tested with v1.8.1 and it accepts 12+ words when restoring a wallet from the old list while the latest version only takes 12 or 24.
If you're certain of the seed phrase and the words all belong to the old wordlist:
Try to restore it in v1.8-1.9.8 that can be downloaded from the "
Previous releases" link in the
official site.
When prompted with connection errors, cancel everything until the wallet is created.
Then open the wallet file "
electrum.dat" using the latest version 4.0.5 (
File->Open->Browse to the location) to sync it to the network and to see your balance.