Can't call method "wipe" on an undefined value

[cakeller98]

Win 7 x64
Citrusperl 5.14 x64

During "Exporting G-code to..." step, I receive this error only when
extruder 3 is set for perimeters, and
extruder 1 is set for infill, support, and support interface

Can't call method "wipe" on an undefined value at C:/Dev/RepRap/Slic3r/lib/Slic3r/GCode.pm line 72.

note this does not occur if perimeters use extruder 2 or 1

[cakeller98]

increased the number of extruders from 3 to 4, and now the error is
Can't call method "absolute_E" on an undefined value at C:/Dev/RepRap/Slic3r/lib/Slic3r/Print.pm line 902.

[cakeller98]

In addition - with the latest commit, I couldn't even change the number of extruders, however I found the config problem.

retract_layer_change = 1,1,

appears that since it was missing it's value - I couldn't change the number of extruders form 3 to 2 or 4 without crashing perl, and once I put in 0,0,0 I was able to slice again.

It would be great if, when slic3r read in configuration information, it could do some validation, especially on arrays - if it's expecting a certain number of items just don't let it fill a value with UNDEFINED without asking the user for the config value or something.

e.g. "Uh, something went wrong and this value is missing [retract on layer change for tool 3] please tell me what you want it to be so i can fix it" - then CORRECT it, and SAVE the ini file.

:) just a thought. - closing the issue

[cakeller98]

Spoke too soon... multi-extruder configs just seems not to work. after deleting all configs, then simply try to add a second extruder by pressing the up-arrow on the extruder number spin control... does this:

[cakeller98]

OK Sorry for all the flailing about - but here's the final thing that seems to clearly be the issue causing this:

08:22:25.625 : <Slic3r> => Exporting G-code to C:\Users\Chirstopher\AppData\Local\RepetierHost\composition.gcode
08:22:25.631 : <Slic3r> Can't call method "wipe" on an undefined value at C:/Dev/RepRap/Slic3r/lib/Slic3r/GCode.pm line 72.

#IF USING MULTI EXTRUDERS - assinging any extruder higher than another extruder that is not used.

IOW -
assinging extruder 1 to everything works fine
assinging extruder 1 to perims and infill and extruder 2 for support and suppor tinterface if fine.
assinging extruder 3 only for everything... DOES NOT WORK
assinging extruder 1 for peterimeters and infill and extruder 3 for support and interface DOES NOT WORK...

any time a lower numbered extruder is un-used, slicing causes the can't call method on undefined value.

strangely assinging everything to extruder 2 does work with a skirt (mine is set for 9999 layers) - but everything on the skirt above the first layer uses EXTRUDER #1, so probably a bug in skirt is causing extruder #1 to be used.... and it is only when extruder #3 is used without any calls for extruder #2 - then this "undefined" element hapens for WIPE.

[cakeller98]

this sucks for me at the moment, because my ext #2 is dead at the moment... but 1 and 3 are not dead :) ....
I could swap them - but then I'd have to modify the offsets... which is what I'm going to do. - work around for the few that might have 3 extruders AND trying only to use 1 and 3 ---- soooooo prolly just ME! 💃

[cakeller98]

There are actually a lot of bugs popping up related to multiple extruders:

If I only want to use extruder 2, slic3r still turns on, and draws a skirt with extruder 1.
as such - if extruder 1 is 0.35, and 2 is 0.5 I can't make a first layer of 0.4mm because it "exceeds the diameter of the extruder" even if I don't have 1 selected for anything...

[alranel]

Hi @cakeller98! I think all of these issues were fixed in the newly released 1.1.1 – except for skirt which I need to redesign.

Can you provide any feedback?

[cakeller98]

Sure, I'll come back and give it a whirl!

[cakeller98]

t\arcs.t ............. 1/24
#   Failed test 'path collection now contains three paths'
#   at t\arcs.t line 70.
#          got: '1'
#     expected: '3'

#   Failed test ''second one is arc' isa 'Slic3r::GCode::ArcFitting::Arc''
#   at t\arcs.t line 72.
#     'second one is arc' isn't defined

#   Failed test ''third one is polyline' isa 'Slic3r::Polyline''
#   at t\arcs.t line 73.
#     'third one is polyline' isn't defined
# Looks like you failed 3 tests of 24.

[alranel]

Fixed by fbce8e6