Not reading psbt file

[HCP]

Would you know why it works with 3 inputs but not with eight for example? My understanding was that anything less than twenty is fine? The small amount of bitcoin in each input means I would have to consolidate multiple batches of three inputs into one, so I end up with six (consolidating eighteen inputs) or so inputs, which I'd then be able to send as two inputs.

Is there an easier fix im missing?

Are you sure you're dealing with actual inputs... or are you looking at addresses? It's possible that some of your addresses contain multiple UTXOs, so if you using addresses, it's possible you might still be exceeding the 20 UTXO limit.

Which tab in Electrum are you spending from? The "coins" tab or the "Addresses" tab?

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[Kaplant4]

Yes I'm choosing inputs from the coins tab. And I just did two transactions, one with three inputs and one with two, and now it is not reading the one with three but it is reading the one with two! It's getting less and less!

[Kaplant4]

This is really debilitating, as even one with five inputs isn't recognised but two inputs is. Is this something to do with electrum's software?

[Kaplant4]

I've been able to send 90% of my bitcoin out of this wallet by keeping the inputs below 20 as per the helpful guidance in this thread.

But for some reason I cannot send the last remaining bit of bitcoin, and this is despite me keeping the inputs to 15, as stated on the transaction window in electrum. Would anyone know why? I'm not sure what has to be done differently. It says 'Inputs (15)'.

[nc50lc]

But for some reason I cannot send the last remaining bit of bitcoin, and this is despite me keeping the inputs to 15, as stated on the transaction window in electrum. Would anyone know why? I'm not sure what has to be done differently. It says 'Inputs (15)'.

Are you getting any error message when spending the last batch of inputs?
If 20 inputs have worked, then 15 shouldn't be a problem.

Also, try to enable logging and see if there's an error related to the issue: "Tools->Preferences->Write logs to file", restart Electrum.
Reproduce the issue in that session, then you can disable logging again; the logs will be saved in "logs" folder inside Electrum data directory.

[Kaplant4]

No there's no error message. I'm able to do everything fine on electrum. I export the file to my microsd card to then sign it on my coldcard, but the coldcard simply does not read it. No error message appears on the coldcard too. It simply gives you the default screen when you select 'ready to sign' stating it is ready to sign transactions. But it doesn't pick up the transaction I saved on my micro sd card.

[Kaplant4]

I think I've figured it out. It's either that the transaction can be a max of 20 inputs, or the size of the transaction cannot exceed more than 384k bytes. The size of the transaction was the issue, not the number of inputs.

This presents a problem in that in order to get all of my remaining bitcoin out of my wallet, I'd have to do about 10 transactions. Is there no way around this?

[o_e_l_e_o]

It's either that the transaction can be a max of 20 inputs, or the size of the transaction cannot exceed more than 384k bytes. The size of the transaction was the issue, not the number of inputs.

How is your transaction with 15 inputs over 384,000 bytes? Do you only have 1 output? What kind of crazy spending requirements are you using that takes up so much space?

Is there no way around this?

I mean, you probably want to first figure out why you are making such a huge transaction, since you are going to get hit for enormous amounts of fees trying to broadcast that.

Do you have the seed phrase from your ColdCard wallet? If not, you can extract it following the instructions here: https://coldcard.com/docs/advanced#danger-zone. Import your seed phrase in to Electrum directly and then you can make any transaction you want. Note that if you don't do this on an airgapped computer, then you risk the security of your wallet and all the coins within it.