# MX\_ERRNOMSG > [HTML Version](mx_errnomsg.htm) **xcall MIAMEX, MX\_ERRNOMSG, errno, message** MX\_ERRNOSMG (MIAMEX 86) returns the operating system’s text message associated with the specified operating system error code (aka **errno**). **Parameters** _errno_ ([Num](num.htm.md)) \[in\] is the error number for which you want the message. Note that many MIAMEX functions return operating system errors as negative numbers; these should be converted to absolute value before passing to this function. See History, below. _message_ ([String](string.htm.md)) \[out\] returns the error message. **See Also** • [ERRMSG](errmsgsbr.htm.md) for information relating to displaying the text corresponding to ASB error numbers.