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I still have a private key from an old Bitcoin wallet (circa 2012), and I have a private key. I downloaded the bitWallet app for iOS, entered my private key there and my wallet with balance and all transactions was displayed. I wanted to transfer bitcoins to my new wallet, but I get the following error:

mandatory-script-verify-flag-failed (Public key is neither compressed or uncompressed)

My secret key is 52 characters long, starts with 5HpH….

Step 1: in the bitWallet (iOS) application I insert the private key, and it automatically calculates the correct address.

Step 2: I click “save” and see my wallet with balance and list of transactions enter image description here

Step 3: I'm trying to transfer bitcoins to my main wallet, I enter the address, click "Done" and get an error:

enter image description here enter image description here

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  • If you added the private key to a bitWallet wallet, the money is already in your wallet so I don't understand why you want to transfer the money from one of your bitWallet wallets to a different bitWallet wallet. Commented May 7 at 9:43
  • The error message is typical of people manually constructing transactions bit it seems unlikely that this is what you are doing. Can you describe exactly what you did step by step? Commented May 7 at 9:44
  • @RedGrittyBrick all because I can’t make transfers, because when I try to send funds I see an error: error mandatory-script-verify-flag-failed (Public key is neither compressed or uncompressed) so I thought the best thing would be to withdraw funds to a new main wallet
    – iKey
    Commented May 7 at 9:45
  • @RedGrittyBrick How can I contact you for a quicker discussion? I promise, if you succeed, you won't regret it. your efforts will be rewarded
    – iKey
    Commented May 7 at 9:47
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    @iKey did you tried with Blue Wallet? It's pretty good supporting old wallets.
    – bordalix
    Commented May 7 at 11:25

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