# Error encountered following beta guide

**URL:** <https://forum.zcashcommunity.com/t/error-encountered-following-beta-guide/1796>\
**Category:** zcashd client\
**Created:** [September 17, 2016, 9:57pm UTC](https://forum.zcashcommunity.com/t/error-encountered-following-beta-guide/1796 "2016-09-17T21:57:42Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![cloudcappedtower](https://avatars.discourse-cdn.com/v4/letter/c/f19dbf/32.png) [@cloudcappedtower](https://forum.zcashcommunity.com/u/cloudcappedtower)\
**Post date:** [September 17, 2016, 9:57pm UTC](https://forum.zcashcommunity.com/t/error-encountered-following-beta-guide/1796/1 "2016-09-17T21:57:42Z")

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I followed the guide here,

> **[Home](https://github.com/zcash/zcash/wiki/)**
>
> Zcash - Internet Money. Contribute to zcash/zcash development by creating an account on GitHub.

When I got to the point of sending my newly mined TAZ to my newly generated private ‘zaddress’, I encounter a crashed. I was however sending three other amounts to that same zaddress at the same time before waiting for the first to complete, I had others queued.

Now when I try to start zcashd I get this error,

> zcashd: wallet/wallet.cpp:605: void CWallet::IncrementNoteWitnesses(const CBlockIndex\*, const CBlock\*, ZCIncrementalMerkleTree): Assertion `nWitnessCacheSize \>= nd-\>witnesses.size()’ failed.

Tried a full restart, same.

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**Author:** ![Voluntary](https://sea2.discourse-cdn.com/zcash/user_avatar/forum.zcashcommunity.com/voluntary/32/4343_2.png) [@Voluntary](https://forum.zcashcommunity.com/u/Voluntary)\
**Post date:** [September 17, 2016, 10:03pm UTC](https://forum.zcashcommunity.com/t/error-encountered-following-beta-guide/1796/2 "2016-09-17T22:03:36Z")

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You may have run out of memory and then triggered that error.

I just caused a different error / file lock error by forcing zcashd to quit… solveequihash 1 1 wouldn’t exit and had crazy CPU usage so I killed the task and now various locks are still in place so zcashd won’t start again.

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**Author:** ![Artlav](https://avatars.discourse-cdn.com/v4/letter/a/edb3f5/32.png) [@Artlav](https://forum.zcashcommunity.com/u/Artlav)\
**Post date:** [September 17, 2016, 10:58pm UTC](https://forum.zcashcommunity.com/t/error-encountered-following-beta-guide/1796/3 "2016-09-17T22:58:06Z")

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It’s a known bug, to be fixed in beta2.  
Basically, when things crash, the wallet can end up in a corrupted state.

Sending a Z transaction is a very memory-intense operation. You should stop mining before doing it unless you have RAM to spare.