Return the error code of the last trapped runtime error, or zero when there has not been one.
errno = MM.ERRNO
MM.ERRNO is read-only. It is set when ON ERROR SKIP or ON ERROR IGNORE skips a statement, when OPTION ERROR CONTINUE is set, and when ON ERROR GOTO traps an error. A non-zero value means an error happened; zero means no trapped error. The exact code is the interpreter’s generic error value (16); use MM.ERRMSG$ for the text.
MM.ERRNO is cleared to zero when the program starts (RUN), and by ON ERROR SKIP, ON ERROR IGNORE and ON ERROR CLEAR. ON ERROR CLEAR only resets MM.ERRNO and MM.ERRMSG$; it leaves the active error mode in force. Use ON ERROR ABORT, or plain ON ERROR with OPTION ERROR ABORT, to stop trapping.
See also MM.ERRMSG$, ON, RESUME.
Example:
ON ERROR SKIP 1
OPEN "C:/.scores" FOR OUTPUT AS #1
IF MM.ERRNO <> 0 THEN PRINT "Cannot save: "; MM.ERRMSG$
ON ERROR ABORTSource: docs/help/mm-errno.txt inmmcore. On the computer, typeHELP MM.ERRNO.