<p>I got an error message but don't understand what to do now, to fix this.</p>
<pre><code>************************
EXCEPTION: NSt8ios_base7failureB5cxx11E       
CDataStream::read(): end of data: iostream error       
bitcoin in opencon       

terminate called after throwing an instance of 'std::ios_base::failure[abi:cxx11]'
  what():  CDataStream::read(): end of data: iostream error
Aborted (core dumped)
</code></pre>
<p>My regtest and signet are doing fine. It's only wallet testnet v3.</p>
<p>I hope somebody can point out what it is and how to fix it.</p>

CC BY-SA 4.0
2021-10-20T22:31:21.930Z
what does this iostream error mean? anybody ?
BG media
CC BY-SA 4.0
2021-10-22T20:14:49.750Z
I'm not a specialist in these things but to me smells like some lib is broken. If you try this on a brand new install of a stable version of mainstream distribution, I would sort of doubt that this kind of bug would be going to happen.
Mercedes
CC BY-SA 4.0
2021-10-24T13:34:43.340Z
thank you i fixed it by making an clean install thank you for your responce .
BG media
<wallet><testnet>
bitcoin-qt -testnet wallet dumped error EXCEPTION: NSt8ios_base7failureB5cxx11E
BG media
# bitcoin-qt -testnet wallet dumped error EXCEPTION: NSt8ios_base7failureB5cxx11E

(Asked by: username_0 on 2021-10-18)

I got an error message but don't understand what to do now, to fix this.

```
************************
EXCEPTION: NSt8ios_base7failureB5cxx11E       
CDataStream::read(): end of data: iostream error       
bitcoin in opencon       

terminate called after throwing an instance of 'std::ios_base::failure[abi:cxx11]'
  what():  CDataStream::read(): end of data: iostream error
Aborted (core dumped)

```

My regtest and signet are doing fine. It's only wallet testnet v3.

I hope somebody can point out what it is and how to fix it.

**Tags:** wallet, testnet

> **Comments:**
> **username_0**: what does this iostream error mean? anybody ?  
> **username_1**: I'm not a specialist in these things but to me smells like some lib is broken. If you try this on a brand new install of a stable version of mainstream distribution, I would sort of doubt that this kind of bug would be going to happen.  
> **username_0**: thank you i fixed it by making an clean install thank you for your responce .  

---

## 0 answers

