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 layout: forum
 title: 'Re: Exception: 9key_error error'
 grand_parent: Forum Posts
 parent: Bitcoin Forum
 nav_order: 97
 date: 2010-05-16 22:53:59 UTC
 original: https://bitcointalk.org/index.php?topic=135.msg1133#msg1133
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 # Re: Exception: 9key_error error
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 ```
 Re: Exception: 9key_error error
 May 16, 2010, 10:53:59 PM
 Does it happen every time you run it, or just happened once at some random time?
 I've never seen that fail before.  It's a call to OpenSSL that I assumed would never fail, but I put an error check there just in case.  I can't imagine how it would fail.  Out of memory maybe.
 The code is:
 key.h:
    EC_KEY* pkey;
        pkey = EC_KEY_new_by_curve_name(NID_secp256k1);
        if (pkey == NULL)
            throw key_error("CKey::CKey() : EC_KEY_new_by_curve_name failed");
 NID_secp256k1 is a constant.
 ```