error calling external function

[James C. Hall]

I am using an external C++ dll to call two external functions for
plotting called start_proctor and start_grain_size. When I make the
call to start_proctor I have no problems. When I call
start_grain_size, I get the following error--Error calling external
function %s at line... The declarations in C are as follows:

extern "C" int __stdcall start_proctor( double points[], double
weights[], double opoints[], double &SG, char sg_estimated[], double
&smooth, char ptitle[], double &pheight, double &pwidth, char
save_location[], int &show, int &ZV, char roundM[], char roundD[], int
&zoom, char cwd[], int &x_scale_major_tick,int &y_scale_major_tick,
char points_of[], char points_color[], char points_type[], int
&points_size, char curve_of[], char curve_color[], int &curve_alpha,
int &curve_size, char grid_of[], char grid_color[], int &grid_alpha,
int &grid_x_dash, int &grid_y_dash, char opt_of[], char opt_color[],
int &opt_alpha, int &opt_x_dash, int &opt_y_dash, int
&x_scale_major_tick_c, int &y_scale_major_tick_c, char points_of_c[],
char points_color_c[], char points_type_c[], int &points_size_c, char
curve_of_c[], char curve_color_c[], int &curve_alpha_c, int
&curve_size_c, char grid_of_c[], char grid_color_c[], int
&grid_alpha_c, int &grid_x_dash_c, int &grid_y_dash_c, char
opt_of_c[], char opt_color_c[], int &opt_alpha_c, int &opt_x_dash_c,
int &opt_y_dash_c, int &return_default, int &splash, double
&optmoisture, double &maxdd, double &percent_oversized, double
&o_SG , double &o_moisture, double &o_optmoisture, double &o_maxdd,
int &oversized_flag, int &debug, char c_output[] );

extern "C" int __stdcall start_grain_size( char dsn_name[], char
userID[], char passwd[], double test_data[], int &td_length, double
upper_bound[], int &ub_length, double lower_bound[], int &lb_length,
char envelope[], char specification[], char pointmarker[], char
splinemarker[], char display[], char scale[], char units[], char
xlabel[], char direction[], char maximum_density_line[], int &pan,
char title[], char save_location[], char cwd[], int &show, double
&width, double &height, char output[] );

And the declarations in PowerBuilder are

Function int start_proctor(ref double points[3,8], ref double
weigthts[8], ref double opoints[3,8], ref double sg, ref string
sg_estimated, ref double smooth, ref string ptitle, ref double
pheight, ref double pwidth, ref string save_location, ref int show,
ref int zv, ref string roundm, ref string roundd, ref int zoom, ref
string cwd, ref int li_x_scale_major_tic, ref int
li_y_scale_major_tic, ref string ls_points_of, ref string
ls_points_color, ref string ls_points_type, ref int li_points_size,
ref string ls_curve_of, ref string ls_curve_color, ref int
li_curve_alpha, ref int li_curve_size, ref string ls_grid_of, ref
string ls_grid_color, ref int li_grid_alpha, ref int li_grid_x_dash,
ref int li_grid_y_dash, ref string ls_opt_of, ref string ls_opt_color,
ref int li_opt_alpha, ref int li_opt_x_dash, ref int li_opt_y_dash,
ref int li_x_scale_major_tic_t, ref int li_y_scale_major_tic_t, ref
string ls_points_of_t, ref string ls_points_color_t, ref string
ls_points_type_t, ref int li_points_size_t, ref string ls_curve_of_t,
ref string ls_curve_color_t, ref int li_curve_alpha_t, ref int
li_curve_size_t, ref string ls_grid_of_t, ref string ls_grid_color_t,
ref int li_grid_alpha_t, ref int li_grid_x_dash_t, ref int
li_grid_y_dash_t, ref string ls_opt_of_t, ref string ls_opt_color_t,
ref int li_opt_alpha_t, ref int li_opt_x_dash_t, ref int
li_opt_y_dash_t, ref int li_return_default, ref int li_splash, ref
double optmoisture, ref double maxdd, ref double pover, ref double
osg, ref double om, ref double o_optmoisture, ref double o_maxdd, ref
int oversized_flag, ref int debug_flag, ref string output) LIBRARY
"ELMTREE_EXTERNAL.dll" ALIAS FOR "start_proctor;ansi"

Function int start_grain_size(ref string dsn_name, ref string userid,
ref string passwd, ref double test_data[], ref int td_length, ref
double upper_bound[], ref int ub_length, ref double lower_bound[], ref
int lb_length, ref string envelope, ref string specification, ref
string pointmarker, ref string splinemarker, ref string display, ref
string scale, ref string units, ref string xlabel, ref string
direction, ref string maximum_density_line, ref int pan, ref string
title, ref string save_location, ref string cwd, ref int show, ref
double width, ref double height, ref string output) LIBRARY
"ELMTREE_EXTERNAL.dll" ALIAS FOR "start_grain_size;ansi"

Any ideas? Thanks,

[bruce.a...@yahoo.com]

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