balajiramani

I just tried this from source and I couldn't reproduce it. Could mean that someone already fixed it. Could you also give me the logs? That way I can verify if your issue is actually solved. Here is a relevant line from the log: 2016-09-02 22:06:29,601 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] Assertion failed: (false && "We should have returned already before here!"), function insert, file /Users/Ultimaker/build/2.3/build/CuraEngine-prefix/src/CuraEngine/src/utils/SparseLineGrid.h, line 112.

Pasting the relevant portions of the log: 2016-09-02 17:25:14,671 - INFO - UM/Backend/Backend.pyc (startEngine [55]): Started engine process: /Applications/Cura.app/Contents/MacOS/CuraEngine 2016-09-02 17:25:14,672 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] Calling engine with: ['/Applications/Cura.app/Contents/MacOS/CuraEngine', 'connect', '127.0.0.1:49674', '-j', '/Applications/Cura.app/Contents/Resources/cura/resources/definitions/fdmprinter.def.json', ''] 2016-09-02 17:25:14,672 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] 2016-09-02 17:25:14,673 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] Cura_SteamEngine version DEV 2016-09-02 17:25:14,673 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] Copyright © 2014 David Braam 2016-09-02 17:25:14,673 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] 2016-09-02 17:25:14,673 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] This program is free software: you can redistribute it and/or modify 2016-09-02 17:25:14,673 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] it under the terms of the GNU Affero General Public License as published by 2016-09-02 17:25:14,674 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] the Free Software Foundation, either version 3 of the License, or 2016-09-02 17:25:14,674 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] (at your option) any later version. 2016-09-02 17:25:14,674 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] 2016-09-02 17:25:14,674 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] This program is distributed in the hope that it will be useful, 2016-09-02 17:25:14,674 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] but WITHOUT ANY WARRANTY; without even the implied warranty of 2016-09-02 17:25:14,674 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 2016-09-02 17:25:14,674 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] GNU Affero General Public License for more details. 2016-09-02 17:25:14,676 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] 2016-09-02 17:25:14,676 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] You should have received a copy of the GNU Affero General Public License 2016-09-02 17:25:14,676 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] along with this program. If not, see . 2016-09-02 17:25:14,682 - DEBUG - UM/Backend/Backend.pyc (_logSocketState [165]): Socket state changed to Connected 2016-09-02 17:25:14,683 - DEBUG - UM/Backend/Backend.pyc (_onSocketStateChanged [155]): Backend connected on port 49674 2016-09-02 17:25:15,201 - DEBUG - .../cura/plugins/CuraEngineBackend/CuraEngineBackend.py (_onStartSliceCompleted [222]): Sending slice message took 0.04148578643798828 seconds 2016-09-02 17:25:15,676 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] [ERROR] Unregistered setting mesh_position_x 2016-09-02 17:25:15,676 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] [ERROR] Unregistered setting mesh_position_y 2016-09-02 17:25:15,676 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] [ERROR] Unregistered setting mesh_position_z 2016-09-02 17:25:15,676 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] [ERROR] Unregistered setting center_object 2016-09-02 17:25:15,677 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] [WARNING] -s support_interface_height="1" -s shell="0" -s retraction_speed="25" -s support_infill_rate="15" -s speed_print="60" -s jerk_layer_0="20" -s wall_thickness="0.8" -s jerk_support="20" -s experimental="0" -s switch_extruder_retraction_speeds="20" -s support_extruder_nr="0" -s cool_fan_full_at_height="0.3" -s cooling="0" -s wall_line_width="0.4" -s material="0" -s platform_adhesion="0" -s dual="0" -s travel="0" -s travel_compensate_overlapping_walls_enabled="True" -s support="0" -s jerk_wall="20" -s speed_support="60" -s resolution="0" -s acceleration_support="3000" -s infill_overlap="10" -s jerk_print="20" -s meshfix="0" -s speed_wall="30.0" -s blackmagic="0" -s speed="0" -s machine_settings="0" -s wireframe_flow="100" -s wireframe_roof_outer_delay="0.2" -s wireframe_roof_drag_along="0.8" -s wireframe_roof_fall_down="2" -s wireframe_strategy="compensate" -s wireframe_drag_along="0.6" -s wireframe_top_jump="0.6" -s wireframe_flat_delay="0.1" -s wireframe_bottom_delay="0" -s wireframe_top_delay="0" -s wireframe_flow_flat="100" -s wireframe_flow_connection="100" -s wireframe_printspeed_flat="5" -s acceleration_wall="3000" -s wireframe_printspeed_down="5" -s wireframe_printspeed_bottom="5" -s wireframe_roof_inset="3" -s wireframe_height="3" -s wireframe_printspeed_up="5" -s magic_fuzzy_skin_thickness="0.3" -s support_conical_min_width="5.0" -s support_conical_enabled="False" -s skin_alternate_rotation="False" -s skin_outline_count="0" -s support_interface_density="100" -s coasting_enable="False" -s draft_shield_height="10" -s draft_shield_height_limitation="full" -s draft_shield_dist="10" -s draft_shield_enabled="False" -s magic_spiralize="False" -s raft_fan_speed="0" -s magic_mesh_surface_mode="normal" -s raft_speed="30.0" -s infill_mesh="False" -s print_sequence="all_at_once" -s meshfix_keep_open_polygons="False" -s ooze_shield_dist="2" -s ooze_shield_angle="60" -s ooze_shield_enabled="False" -s multiple_mesh_overlap="0.15" -s prime_tower_wipe_enabled="False" -s prime_tower_flow="100" -s prime_tower_position_y="200" -s wireframe_nozzle_clearance="1" -s prime_tower_position_x="200" -s prime_tower_size="0" -s support_extruder_nr_layer_0="0" -s adhesion_extruder_nr="0" -s raft_base_fan_speed="0" -s bottom_thickness="0.8" -s machine_max_jerk_e="5.0" -s skin_overlap_mm="0.02" -s raft_interface_jerk="20" -s wireframe_up_half_speed="0.3" -s raft_surface_acceleration="3000" -s support_interface_extruder_nr="0" -s support_line_distance="2.6666666666666665" -s raft_interface_speed="22.5" -s material_print_temperature="200" -s raft_base_line_spacing="1.6" -s raft_surface_line_spacing="0.4" -s raft_surface_line_width="0.4" -s cool_fan_speed="100.0" -s coasting_min_volume="0.8" -s prime_tower_enable="False" -s raft_surface_thickness="0.1" -s raft_interface_line_width="0.8" -s machine_disallowed_areas="[]" -s infill_sparse_density="20" -s jerk_support_interface="20" -s support_bottom_distance="0.1" -s raft_surface_layers="2" -s raft_airgap="0.3" -s raft_margin="15" -s brim_line_count="20" -s extruder_prime_pos_z="0" -s acceleration_prime_tower="3000" -s skirt_gap="3" -s extruder_prime_pos_y="0" -s conical_overhang_angle="50" -s retraction_retract_speed="25" -s extruder_prime_pos_x="0" -s support_tower_diameter="3.0" -s retraction_enable="True" -s support_interface_line_distance="0.4" -s raft_acceleration="3000" -s support_bottom_height="1" -s support_interface_enable="False" -s support_join_distance="2.0" -s material_standby_temperature="175" -s support_bottom_stair_step_height="0.3" -s support_xy_distance_overhang="0.2" -s support_xy_distance="0.7" -s wall_line_width_x="0.4" -s raft_base_thickness="0.36" -s support_top_distance="0.1" -s machine_nozzle_tip_outer_diameter="1" -s support_pattern="zigzag" -s support_offset="0.2" -s jerk_travel_layer_0="30.0" -s support_type="everywhere" -s cool_lift_head="False" -s cool_fan_speed_min="100.0" -s retraction_prime_speed="25" -s cool_min_speed="10" -s cool_fan_enabled="True" -s travel_avoid_distance="0.625" -s jerk_print_layer_0="20" -s jerk_support_infill="20" -s raft_interface_fan_speed="0" -s jerk_topbottom="20" -s jerk_wall_x="20" -s acceleration_enabled="False" -s jerk_wall_0="20" -s magic_fuzzy_skin_enabled="False" -s jerk_enabled="False" -s infill_mesh_order="0" -s raft_base_speed="22.5" -s speed_travel="120" -s layer_0_z_overlap="0.15" -s machine_max_acceleration_y="9000" -s acceleration_skirt_brim="3000" -s acceleration_travel_layer_0="5000.0" -s travel_avoid_other_parts="True" -s acceleration_print_layer_0="3000" -s jerk_infill="20" -s acceleration_support_interface="3000" -s raft_surface_jerk="20" -s acceleration_support_infill="3000" -s acceleration_wall_0="3000" -s machine_head_with_fans_polygon="[[-20, 10], [10, 10], [10, -10], [-20, -10]]" -s retraction_combing="all" -s acceleration_infill="3000" -s wireframe_fall_down="0.5" -s speed_equalize_flow_max="150" -s speed_equalize_flow_enabled="False" -s top_bottom_pattern="lines" -s skirt_brim_line_width="0.4" -s cool_fan_full_layer="0" -s cool_min_layer_time_fan_speed_max="10" -s speed_slowdown_layers="2" -s skirt_brim_speed="30" -s support_enable="False" -s conical_overhang_enabled="False" -s speed_travel_layer_0="60.0" -s raft_jerk="20" -s speed_print_layer_0="30" -s raft_interface_thickness="0.15000000000000002" -s infill="0" -s magic_fuzzy_skin_point_dist="0.8" -s coasting_speed="90" -s support_infill_extruder_nr="0" -s speed_prime_tower="60" -s speed_support_infill="60" -s raft_base_jerk="20" -s speed_wall_x="60.0" -s machine_max_jerk_xy="20.0" -s extruder_prime_pos_abs="False" -s gradual_infill_step_height="5.0" -s speed_wall_0="30.0" -s switch_extruder_retraction_speed="20" -s retraction_hop="1" -s retraction_hop_only_when_collides="False" -s retraction_hop_enabled="False" -s acceleration_wall_x="3000" -s coasting_volume="0.064" -s machine_min_cool_heat_time_window="50.0" -s retraction_amount="6.5" -s skirt_line_count="1" -s retraction_count_max="90" -s prime_tower_line_width="0.4" -s machine_max_feedrate_e="25" -s material_flow="100" -s machine_height="300" -s raft_base_acceleration="3000" -s switch_extruder_retraction_amount="16" -s material_bed_temperature="60.0" -s jerk_skirt_brim="20" -s machine_heat_zone_length="16" -s infill_wipe_dist="0.1" -s travel_compensate_overlapping_walls_x_enabled="True" -s infill_overlap_mm="0.04" -s machine_max_acceleration_e="10000" -s infill_pattern="cubic" -s alternate_extra_perimeter="False" -s material_print_temp_wait="True" -s retraction_hop_after_extruder_switch="True" -s speed_layer_0="30" -s raft_surface_speed="30.0" -s skirt_brim_minimal_length="250" -s layer_height="0.1" -s infill_line_distance="6.0" -s machine_name="FDM Printer Base Description" -s z_seam_type="shortest" -s retraction_extrusion_window="6.5" -s xy_offset="0" -s infill_sparse_thickness="0.1" -s speed_topbottom="30.0" -s retraction_extra_prime_amount="0" -s support_area_smoothing="0.6" -s travel_compensate_overlapping_walls_0_enabled="True" -s raft_base_line_width="0.8" -s wireframe_straight_before_down="20" -s support_line_width="0.4" -s acceleration_layer_0="3000" -s retraction_min_travel="0.8" -s machine_start_gcode="G28 ;Home 2016-09-02 17:25:15,677 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] G1 Z15.0 F6000 ;Move the platform down 15mm 2016-09-02 17:25:15,677 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] ;Prime the extruder 2016-09-02 17:25:15,678 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] G92 E0 2016-09-02 17:25:15,678 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] G1 F200 E3 2016-09-02 17:25:15,678 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] G92 E0" -s brim_width="8.0" -s wall_0_inset="0" -s raft_surface_fan_speed="0" -s raft_interface_acceleration="3000" -s support_minimal_diameter="3.0" -s machine_max_acceleration_x="9000" -s speed_support_interface="40.0" -s material_print_temp_prepend="True" -s machine_max_feedrate_z="5" -s magic_fuzzy_skin_point_density="1.25" -s wall_line_count="2" -s meshfix_union_all_remove_holes="False" -s material_diameter="2.85" -s top_layers="8" -s support_interface_line_width="0.4" -s wireframe_printspeed="5" -s machine_acceleration="4000" -s support_roof_height="1" -s infill_line_width="0.4" -s machine_max_feedrate_x="500" -s machine_width="200" -s gradual_infill_steps="0" -s machine_show_variants="False" -s skin_line_width="0.4" -s support_z_distance="0.1" -s layer_height_0="0.3" -s wall_line_width_0="0.4" -s acceleration_print="3000" -s machine_heated_bed="True" -s line_width="0.4" -s machine_minimum_feedrate="0.0" -s material_extrusion_cool_down_speed="0.5" -s machine_nozzle_head_distance="3" -s machine_max_acceleration_z="100" -s raft_interface_line_spacing="1.0" -s cool_min_layer_time="5" -s machine_max_jerk_z="0.4" -s machine_use_extruder_offset_to_offset_coords="True" -s machine_nozzle_size="0.4" -s jerk_travel="30" -s jerk_prime_tower="20" -s acceleration_topbottom="3000" -s machine_max_feedrate_y="500" -s meshfix_extensive_stitching="False" -s bottom_layers="8" -s gantry_height="99999999999" -s material_bed_temp_wait="True" -s material_bed_temp_prepend="True" -s machine_depth="200" -s machine_nozzle_cool_down_speed="2.0" -s max_feedrate_z_override="0" -s machine_nozzle_heat_up_speed="2.0" -s support_conical_angle="30" -s brim_outside_only="True" -s meshfix_union_all="True" -s infill_before_walls="True" -s material_flow_dependent_temperature="False" -s adhesion_type="brim" -s support_tower_roof_angle="65" -s cool_fan_speed_max="100.0" -s acceleration_travel="5000" -s machine_nozzle_expansion_angle="45" -s support_use_towers="True" -s support_connect_zigzags="True" -s machine_extruder_count="1" -s machine_head_polygon="[[-1, 1], [-1, -1], [1, -1], [1, 1]]" -s machine_center_is_zero="True" -s wireframe_enabled="False" -s support_interface_pattern="concentric" -s material_flow_temp_graph="[[3.5,200],[7.0,240]]" -s support_xy_overrides_z="z_overrides_xy" -s top_bottom_thickness="0.8" -s support_angle="50" -s machine_gcode_flavor="RepRap" -s switch_extruder_prime_speed="20" -s top_thickness="0.8" -s machine_end_gcode="M104 S0 2016-09-02 17:25:15,678 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] M140 S0 2016-09-02 17:25:15,678 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] ;Retract the filament 2016-09-02 17:25:15,679 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] G92 E1 2016-09-02 17:25:15,679 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] G1 E-1 F300 2016-09-02 17:25:15,679 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] G28 X0 Y0 2016-09-02 17:25:15,679 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] M84" -s skin_overlap="5" -s speed_infill="60" -s skin_no_small_gaps_heuristic="True" -g -e0 -s extruder_prime_pos_x="0" -s machine_extruder_end_pos_y="0" -s machine_nozzle_offset_y="0" -s machine_extruder_end_pos_x="0" -s machine_extruder_end_pos_abs="false" -s machine_nozzle_offset_x="0" -s machine_extruder_start_pos_y="0" -s extruder_prime_pos_z="0" -s machine_extruder_start_pos_x="0" -s machine_extruder_start_pos_abs="false" -s extruder_prime_pos_y="0" -s machine_name="Extruder" -s extruder_nr="0" -e0 -l "0" 2016-09-02 17:25:17,773 - DEBUG - UM/Backend/Backend.pyc (_backendLog [88]): [backend] Assertion failed: (false && "We should have returned already before here!"), function insert, file /Users/Ultimaker/build/2.3/build/CuraEngine-prefix/src/CuraEngine/src/utils/SparseLineGrid.h, line 112. 2016-09-02 17:25:17,773 - DEBUG - .../cura/plugins/CuraEngineBackend/CuraEngineBackend.py (_onBackendQuit [412]): Backend quit with return code -6. Resetting process and socket. I just tried this from source and I couldn't reproduce it. Could mean that someone already fixed it. Could you also give me the logs? That way I can verify if your issue is actually solved.

I was excited to see the features of 2.3 and downloaded it. Loved the custom machine setting. Used it to set it up for my delta and checked the setting "machine center is zero". Then when I loaded a model, the slicing would just hang part way. When I tried unchecking the "machine center is zero" and tried slicing, it worked. So, it looks like slicing fails when the "machine center is zero" is checked. Thanks, Balaji