The #error directive causes a diagnostic message, along with any included token arguments, to be produced by HP C++.
Examples
// This directive will produce the diagnostic
// message "FLAG not defined!".
#ifndef FLAG
#error "FLAG not defined!"
#endif
// This directive will produce the diagnostic
// message "TABLE_SIZE must be a multiple of 256!".
#if TABLE_SIZE % 256 != 0
#error "TABLE_SIZE must be a multiple of 256!"
#endif
NOTE: The #error directive is not supported when using the compatibility mode preprocessor.
