.ERRNB           Error If String Is Not Blank                  MASM Directive

.ERRNB    <string>

Forces a fatal error if string is not blank.

Notes:     Note that the angle brackets, <>, are required around
the string.  The string can be any name, number, or
expression.

The error message that may be generated by this
directive is 'Forced error - string not blank', which is
error number 95.

If an error is generated, the object module is deleted
and the assembler exits with an exit code of 7.

.ERRB and .ERRNB are usually used to detect the presence
or absence of parameters in a macro.

See also: .ERRB
See also: IFB
See also: IFNB

.ERRNB Error If String Is Not Blank