So, the walktrough is perfectly valid IF you're planning to migrate from electrum to core, and never use electrum again...
I don't want to be presumptive, but I'm almost sure what mocacinno meant is that you should not use Electrum with
the same wallet again. You can still use both, but his warning is valid if you plan to keep using the same wallet in both clients.
exactly
yeah, i did not mean that the OP could never use electrum again, just not the wallet he tried to export from electrum to core
I don't want to go on a tangent, and I think the answers given are the best method for the OP, but this brings up another question that isn't at all off topic; in
this post HCP discusses using a tool designed to convert a mnemonic seed to a WIF private key which can be used as an HD seed by core.
Here's a link to the tool:
https://github.com/tekbe/wallet-toolsI haven't used this method myself, and I'm not promoting the tool, but I'm curious if it can be used to obtain the WIF HD seed that correlates to the Master Private Key generated by an Electrum mnemonic seed.
A rainy day experiment, perhaps.
I might be mistaking, but i think that tool converts a mnemonic to a seed, but the result of using the mnemonic into electrum and using said mnemonic together with this tool to create a seed will result in two completely different wallets... Not 100% sure tough.
Simply put: it's a tool to make simpler backups of your core wallet (since we're all used to backup seed phrases by now), but using electrum's seed with this tool and importing the output into core is not the same as restoring an electrum wallet into core.