Trying to send a transaction via bitcoin-cli. It seems to be working on my end but if I look up the transaction ID 76f2b87d7fbd18a217626761cdea215b66d523a3471e446c4fb0147645647866 on any block explorers, it tells me not found.

I've tried to push it using https://blockchain.info/pushtx, but again I get a not found error. Doing the same on blockr.io gives me Did you sign your transaction? Is this double spend? Have you already sent this transaction?

I'm not sure how to debug this or fix it. Can someone point me in the right direction?

Hex representation:


  • What software package and version created this transaction? Feb 8, 2017 at 22:29

1 Answer 1


Sending this transaction through my own Bitcoin Core 0.13.99 node:

error message:
64: too-long-mempool-chain

This means you're building a long chain of unconfirmed transactions that depend on each other. Wait until the first few of those have confirmed before creating more.

  • Will it automatically enter the chain once that happens or will I need to rebroadcast it? How can I get the transaction ids it's depending on?
    – Rob
    Feb 8, 2017 at 22:33
  • Also, which command do you use to send that? If I do the same, will it be the same as using blockchain.info's pushtx tool?
    – Rob
    Feb 8, 2017 at 22:34
  • It depends, if it's a transaction relevant to your wallet, and your node is running, it will automatically rebroadcast as needed (the upcoming 0.14 release of Bitcoin Core improves upon this). If not, you'll need to manually rebroadcast with sendrawtransaction (which is what I used to broadcast). Don't rely on blockchain.info, it's perpetually outdated. Feb 8, 2017 at 22:39
  • bookmark this link for submitting transactions: smartbit.com.au/txs/pushtx
    – amaclin
    Feb 8, 2017 at 22:45
  • 1
    @Rob Anyone can submit the transaction now that you've made it public. It's almost certain that someone will. Feb 8, 2017 at 23:45

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