[#ERR_add_error_mem_bio]
= ERR_add_error_mem_bio
:mrdocs:

Append the contents of memory BIO `bio` as auxiliary data to the most recent error.

== Synopsis

Declared in `<openssl/err.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
ERR_add_error_mem_bio(
    char const* sep,
    xref:BIO.adoc[BIO]* bio);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *sep*
| Optional separator inserted before the BIO contents when needed, or NULL.
| *bio*
| Memory BIO whose contents are appended (a trailing NUL is added if missing).
|===


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