prusa-slicer - fail to slice a simple model  

prusa-slicer - fail to slice a simple model

Dear all,

 I created quite a simple model with openscad.

However when trying to slice it with latest PrusaSlicer (Version: 2.1.0+win64
Build: PrusaSlicer-2.1.0+win64-201909160915) it fails.

I am using original presets and I am unclear why it finally fails.

The openscad-source-code:

//cr10 - ditan

//nema17 motor stuff
nema17_lochabstand=31;
nema17_radius=1.7;
nema17_seitenlaenge=42;
nema17_hull_radius=2;
nema17_boden_dicke=5;
nema_17_center_hole_dia=24;

//bottom_plate specifics
screw_enlarger_height=5;
screw_enlarger_radius=3.5;
3mm_screw_radius=1.45;

//ditan
ditan_orinal_srew_distance=67.5;
ditan_original_length=80;
ditan_original_height=20;
ditan_mount_thickness=4;
ditan_mount_height=55;
ditan_mount_height_cooling=12; // set to zero to disable
ditan_flatwasher=2.3;

module ditan_holes (radius) {
cylinder (r=radius,h= ditan_mount_thickness+screw_enlarger_height,$fn=32);
translate ([ditan_orinal_srew_distance,0,0]) cylinder (r=radius,h= ditan_mount_thickness+screw_enlarger_height,$fn=32);
}

module ditan_mount_eine_seite () {
height=ditan_mount_height+ditan_mount_height_cooling;
//cube ([ditan_mount_thickness,ditan_original_length,height]);
difference () {
union () {
translate ([ditan_original_length,0,0]) rotate ([0,0,90]) cube ([ditan_mount_thickness,ditan_original_length,height]);
//loecher_verstaerkung oben
translate ([(ditan_original_length-ditan_orinal_srew_distance)/2,0,height-ditan_original_height/2]) rotate ([-90,0,0]) ditan_holes (screw_enlarger_radius);
//loecher_verstaerkung unten
translate ([(ditan_original_length-ditan_orinal_srew_distance)/2,0,ditan_original_height/2]) rotate ([-90,0,0]) ditan_holes (screw_enlarger_radius);
}
//loecher
//oben
translate ([(ditan_original_length-ditan_orinal_srew_distance)/2,0,height-ditan_original_height/2]) rotate ([-90,0,0]) ditan_holes (3mm_screw_radius);
//unten
translate ([(ditan_original_length-ditan_orinal_srew_distance)/2,0,ditan_original_height/2]) rotate ([-90,0,0]) ditan_holes (3mm_screw_radius);
}
}

module ditan_mount () {
height=ditan_mount_height+ditan_mount_height_cooling;
color ("blue") ditan_mount_eine_seite ();
translate ([ditan_original_length,-ditan_original_length,0]) mirror ([1,0,0]) color ("green") rotate ([0,0,90]) ditan_mount_eine_seite ();
translate ([ditan_original_length,0,0]) cube ([ditan_mount_thickness,ditan_mount_thickness,ditan_mount_height+ditan_mount_height_cooling]);

}

ditan_mount ();

Kindly ask for help whats required to slice it successfully?

thanks

christian