`get_error_message` does not return an output when `options_.noprint = 1`
get_error_message must return an output, but does so only when
options_.noprint = 0. Hence, there is an unexpected error message when both
info(1) > 0 and
options_.noprint = 1. To replicate, see attached example1_ed.mod, where I set
alpha = -0.36 to generate an error and added the
noprint option. See attached slightly revised print_info.m and get_error_message.m where the issue is solved.