Offline wallet noob question

[john_doe]

Warning: this is probably a noob question, so if you can't stand noobs, then please leave now!

I have an offline wallet and an online wallet restored with the master public key (watch-only mode). I'm trying to send funds to a third-party address by following these steps: https://electrum.org/tutorials.html#offline-mpk

The problem is that I can't sign the transaction using the offline wallet because the transaction uses addresses that the offline wallet has never seen and are empty (this is my guess, but it makes sense). I'm getting the following error: "wallet not synchronized". It kind of makes sense: how can you spend something that (apparently) you don't have?

I guess there must be some way of synchronizing the offline wallet (apart from bringing it online). But how?

Thanks!

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[Abdussamad]

If you can't see the transaction input addresses in your offline wallet then you need to nudge it to generate those addresses. See here:

https://bitcointalk.org/index.php?topic=344115.0

[ThomasV]

the fact that the offline wallet is not synchronized should not be a problem.
by definition, an offline wallet is not synchronized.
are you using 1.9.7? previous 1.9.x versions had a bug that prevented offline signing.