Ordinarily, a gnuplotfortran function call will not return any diagnostic information about any warnings, or even echo the gnuplot session commands as they are executed. However, the module gnuplot_module_data
contains two logical variables that can be modified by user to debug any possible problems :
GNUPLOT_SHOWWARNINGS
If set to .true.
, it will echo any warnings generated at run time.
GNUPLOT_SHOWDEBUG
If set to .true.
, it will echo all the gnuplot commands as they are piped for execution. This can be useful in tracking down some obscure errors.