Plot_init 
INQ_ENV 10 
LET Os ( INQ 4 ) 7 
LET Is_windows ( ( Os 7 > 5 ) AND ( Os 7 < 9 ) ) 1 
LET Is_hp_ux ( Os 7 = 2 ) 0 
LET Sys_plot_format '' 
LET Sys_plot_color_option 0 
LET Sys_plot_stop_on_error TRUE 
LET Sys_plot_sheets FALSE 
LET Is_gdi_printer 0 
LET Is_clipboard 0 
LET Is_hpgl 0 
LET Is_hpgl2 0 
LET Is_hpgl2_rtl 0 
LET Is_pdf 0 
LET Is_postscript 0 Reset_sys_plot_configuration 
CREATE_LTAB 25 6 Get_sys_plot_configuration_ltab_name 
  'Sys_plot_configuration_ltab' 
LET Sys_plot_configuration_index 0 Set_sys_plot_type '' 
LET Plotter_name ( STR Plotter_name '' ) '' 
IF ( Plotter_name '' <> '' ) 0 
LET Sys_plot_type Plotter_name '' 
IF ( Sys_plot_configuration_index 0 ) 0 Set_sys_plot_filename_prefix '' 
IF ( TYPE String '' <> STRING ) 0 
LET Sys_plot_filename_prefix String '' 
IF ( Sys_plot_configuration_index 0 ) 0 
PLOT_DESTINATION 
IF ( Sys_plot_filename_delold 0 ) 0 Sys_plot_filename_prefix ''  { untrapped token error occurred } 

TRACE