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In order to use etherwallet in private chain setup, I completed following Use Your Own Server Guide, answer_1 and answer_2. I have added Custom Node and MyEtherWallet works , except sometimes it requires refreshing the page if there is disconnection with the node.

As an example, I can see my correct account balance, where I verified the value also in geth.

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When I tried to send a transaction to a valid account address on my private blockchain, I have faced with the following error: invalid sender.

[Q] What may be the reason of this error and how can I fix it? I am able to complete this transaction inside geth.

enter image description here

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alper
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    Please, use the myetherwallet tag for the underlying software. the ethereum-wallet-dapp tag refers to the wallet used by the mist browser. Thanks! :-) – q9f Jan 10 '17 at 09:06
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    are you using chainId 1 on your private network or do you have a different chainId? do the same setup with EIP155 off and let us know how it goes – kvhnuke Jan 10 '17 at 09:55
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    Ah I feel like stupid, On the window popped up when I open Add Custom Node => I didn't checked the box next to Custom and chainID was empty as default value, I did that and it worked. I was using default checked next to ETH which was giving the error. – alper Jan 10 '17 at 10:58
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    FYI, the chainId is the identifier for the chain. It was introduced in eip-155 to prevent replays on different chains. Ropsten is 3, eth is 1. If you have a custom ethereum chain, it would be whatever you set it up as. – tayvano Jan 10 '17 at 12:00

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