Bitcoin Forum

Just tried sending BTC to my exchanger from my Blockchain.info wallet, and got this error:

Validation Error: Error #-26: 258: txn-mempool-conflict

What on earth is this junk? First time I ever encountered this, and I have no idea why it's happening, or what it means.

Has anyone else experienced this, and how did you guys fix it?

I don't know what exactly is causing this error. Are there any unconfirmed transactions? Searched the net and there are a few similar complaints, all were reported this month, but no solution apart from contacting blockchain support, but there customer service is a bit slow.

Alternative option would be get your private keys from blockchain and import it to Electrum wallet or Mycelium.

Exactly - that's what struck me as odd, all the complaints regarding this error were from the last week or so.

I have no unconfirmed transactions - everything I have received is fully confirmed, and I don't have any sent transactions that are unconfirmed either.

I sent a support ticket to Blockchain - how exactly can I export my private keys?

I tried creating a transaction and broadcasting it manually using the instructions from this topic:

https://bitcoin.stackexchange.com/questions/58228/need-solution-validation-error-mempool-conflict/58238#58238

The resulting transaction is:

https://blockexplorer.com/tx/91e53db2b404f766f5673189005cf8022d77bcd3983dcc8c94e497c469bcb3e8

Blockchain does not see the transaction, and my balance has not changed.

Does the above transaction exist at all?

https://bitcointalk.org/index.php?topic=2102398.0
We've got this error also but i don't have any unconfirmed transactions... Support simply do nothing.

UPD: Tried to send again... and succeeded!! No messages from support... no nothing. Just worked this time.

Thanks god for sending me to your thread, been waiting 10
days and it finally worked

l can speed up the unconfirmed  transaction. Just write to my email docent.andrew@gmail.com

how long can blockchain deny a cusotmer form making a transfer.  been days. 

what is this garbage, direct help tickets at blockchain are worthless, no replies or only very slowly.

cant send bitcoins?  any ideas?  can accept coins to wallet no problem ,  nothing pending, nothing unconfirmed  and there are bitcoins to send in the wallet

every address I send to every amount gets this error


Validation Error: BitcoindException(super=com.neemre.btcdcli4j.core.BitcoindException: Error #-26: 258: txn-mempool-conflict, code=-26)

Same validation error appeared for me today. After 14 hours it's still not resolved. Support says that they're aware of the issue and blablablaa and do nothing to fix it.

Won't even spit towards Blockchain.info after I (hopefully) get my money out of the account, this is just unacceptable as it seems like this has been goin on for weeks.

Edit:

I managed to get out my coins using:

https://github.com/OmniLayer/omniwallet/wiki/Exporting-Private-Key-from-Blockchain.info-and-Importing-to-Omniwallet.org

However after that, on blockchain.info my account balance is still 0.004 BTC but when viewing all the account addressess, there are no single satoshi on any. No wonder why we get errors, blockchain.info have really messed it up.