# Hex correlation ID (-HCID)

Use
the Hex Correlation ID adapter command (`-HCID`) to specify
correlation identifiers using hexadecimal pair notation. This passes to the
adapter the exact correlation ID to locate, even if that correlation ID contains
non-printable values, spaces, or even null characters.

`-HCID ``hex_correlation_ID`

**Option****Description**`hex_correlation_ID`- This is the hexadecimal correlation identifier.
For example, the ASCII correlation ID

`My Msg`is represented as`4D79204D7357`when specified with the Hex Correlation ID adapter command (`-HCID`). The space character must be encoded in the hex pair notation.

The hexadecimal correlation ID wildcard notation
is not encoded in the hex pair notation. The wildcard character ***** is
entered literally. For example, the hexadecimal pair notation for`x*z` is `78*7A`,
not `782A7A`. The Hex Correlation ID (`-HCID`)
cannot be used with the Correlation ID adapter command (`-CID`).