@dc42 So I fixed it so now tool 0 is set to the same temperature, but still no dice.

I looked at the files with the 0 the end of name, and they are all empty. I'm not aware of any for tool 1. Also FYI the dual extrusion system uses only one hot end/nozzle.

Here is the Cura tool change code:
G92 E0
G91 ; relative positioning
G1 E18 F540 ; 9mm/s purge
G1 E-20 F3000 ; 50mm/s retract
G4 P2500 ; 2.5s cooling period
G1 E-140 F3000 ; 50mm/s long retract
T1
G92 E0
G91 ; relative positioning
G1 E100 F3000 ; 50mm/s feed
G1 E50 F1500 ; 25mm/s feed
G1 E5 F300 ; 5mm/s feed
M109 S205
M104 T0 S180

Here is my config.g:

; Configuration file for Duet WiFi (firmware version 1.17)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool on Fri Apr 28 2017 16:37:23 GMT-0500 (Central Daylight Time)

; General preferences
M111 S0 ; Debugging off
G21 ; Work in millimetres
G90 ; Send absolute coordinates...
M82 ; ...but relative extruder moves
M555 P2 ; Set firmware compatibility to look like Marlin

;Tool settings
M563 P0 D4 H1
;Dual z axis
M584 X0 Y1 Z2:3 U3 E4:5

M667 S1 ; Select CoreXY mode
M208 X0 Y0 Z0 S1 ; Set axis minima
M208 X275 Y285 Z245 S0 ; Set axis maxima

; Endstops
M574 X1 Y1 Z2 U2 S0 ; Define active low and unused microswitches
M558 P5 X0 Y0 Z1 H5 F120 T6000 ; Set Z Probe to type Switch or Digital output where Z probe connector is used. Used for z only.
G31 P50 X0 Y-20 Z2.12 ; Set Z probe trigger value, offset and trigger height
M557 X15:260 Y15:270 S30 ; Define mesh grid

; Drives
M569 P0 S1 ; Drive 0 goes forwards
M569 P1 S1 ; Drive 1 goes forwards
M569 P2 S0 ; Drive 2 goes backwards
M569 P3 S0 ; Drive 3 goes backwards
M569 P4 S0 ; Drive 4 goes backwards
M569 P5 S1 ; Drive 5 goes forwards
M350 X16 Y16 Z16 U16 E16:16 I1 ; Configure microstepping with interpolation
M92 X160 Y160 Z800 U800 E500:500 ; Set steps per mm
M566 X900 Y900 Z12 U12 E900:900 ; Set maximum instantaneous speed changes (mm/min)
M203 X6000 Y6000 Z600 U600 E3600:3600 ; Set maximum speeds (mm/min)
M201 X500 Y500 Z250 U250 E250:250 ; Set accelerations (mm/s^2)
M906 X800 Y800 Z800 U800 E1200:1200 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Heaters
M307 H0
M307 H7 A-1 C-1 D-1
M143 H0 S100; Set heated bed temperature to 100
M143 H1 S260 ; Set maximum hotend heater temperature to 260C
M305 P1 T100000 B4725 C7.060000e-8 R4700 ; Set thermistor + ADC parameters for heater 1
M305 P0 T100000 B4408 C7.269774e-8 R4700 ; set heated bed thermistor

; Tools
M563 P0 D0 H1 ; Define tool 0
G10 P0 X0 Y0 Z0 ; Set tool 0 axis offsets
G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C
M563 P1 D1 H1 ; Define tool 1
G10 P1 X0 Y0 Z0 ; Set tool 1 axis offsets
G10 P1 R0 S0 ; Set initial tool 1 active and standby temperature to 0C

; Network
M550 PIanCorexy ; Set machine name
M551 PIcorexy ; Set password ;
M552 S1 ; Enable network and acquire dynamic address via DHCP

; Fans
M106 P0 S0.3 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P1 S1 I0 F500 H-1 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P2 S1 I0 F500 H-1 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned off

;Zprobe bltouch

; Custom settings are not configured

I can also tell you that the system I use only has one hot end. Also it appears to extrude fine with each extruder when not in a print.

Hello, I recently upgraded my machine to the Prometheus dual extrusion system. I'm currently stuck. I cannot get dual extrusion to work properly. The machine worked properly when using only one filament. When attempting dual extrusion test prints, the machine will stop and stay in one spot when the filament is supposed to switch. The machine will then retract the filament and extrude the other filament slightly only to retract it again. It will stay in the same spot and do this until I manually stop the print. I am using Cura to slice. I know this is vague, but I'm not sure what details would be helpful for me to provide.

I appreciate any help.
Thanks,
Ian

I found the problem, I had G32 in the bed.g instead of G29. Thank you for the help

Hello, I recently changed my method of homing my z axis to use my bed probe. I also probe the bed after homing the Z axis. I used to be successful in my meshgrid compensation, but now I experience problems.Now whenever I run G32 after homing, I get:

Error: Push(): stack overflow!

and sometimes

Error: Max open file count exceeded

I'm running the latest firmware and would appreciate any help on this issue.
Thanks,
Ian

I used to run my printer without an expansion board, and had the bltouch working properly. I have recently installed the duex 5 expansion board and connect the bltouch to the corresponding pwm port. Now when I run the same commands as before, I do not get any reaction from the probe. It is possible that I have it plugged into the wrong pwm port. I also wouldn't be surprised if there was an error in my configuration. FYI I have no heaters plugged into the duex.
Thanks for any help,
Ian
Here is my config.g in case it is needed: {

; Configuration file for Duet WiFi (firmware version 1.17)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool on Fri Apr 28 2017 16:37:23 GMT-0500 (Central Daylight Time)

; General preferences
M111 S0 ; Debugging off
G21 ; Work in millimetres
G90 ; Send absolute coordinates…
M82 ; ...but relative extruder moves
M555 P2 ; Set firmware compatibility to look like Marlin

;Tool settings
M563 P0 D4 H1
;Dual z axis
M584 X0 Y1 Z2:3 U3 E4 E5

M667 S1 ; Select CoreXY mode
M208 X0 Y0 Z0 S1 ; Set axis minima
M208 X275 Y285 Z235 S0 ; Set axis maxima

; Endstops
M574 X1 Y1 Z2 U2 S0 ; Define active low and unused microswitches
M558 P5 X0 Y0 Z1 H5 F120 T6000 ; Set Z Probe to type Switch or Digital output where Z probe connector is used. Used for z only.
G31 P50 X0 Y20 Z1 ; Set Z probe trigger value, offset and trigger height
M557 X15:260 Y15:270 S20 ; Define mesh grid

; Drives
M569 P0 S1 ; Drive 0 goes forwards
M569 P1 S0 ; Drive 1 goes backwards
M569 P2 S0 ; Drive 2 goes backwards
M569 P3 S0 ; Drive 3 goes backwards
M569 P4 S0 ; Drive 4 goes backwards
M350 X16 Y16 Z16 U16 E16 I1 ; Configure microstepping with interpolation
M92 X160 Y160 Z800 U800 E175 ; Set steps per mm
M566 X900 Y900 Z12 U12 E120 ; Set maximum instantaneous speed changes (mm/min)
M203 X6000 Y6000 Z600 U600 E1200 ; Set maximum speeds (mm/min)
M201 X500 Y500 Z250 U250 E250 ; Set accelerations (mm/s^2)
M906 X800 Y800 Z800 U800 E2000 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Heaters
M307 H0
M307 H7 A-1 C-1 D-1
M143 H0 S100; Set heated bed temperature to 100
M143 H1 S260 ; Set maximum hotend heater temperature to 260C
M305 P1 T100000 B4725 C7.060000e-8 R4700 ; Set thermistor + ADC parameters for heater 1
M305 P0 T100000 B4408 C7.269774e-8 R4700 ; set heated bed thermistor

; Tools
M563 P0 D0 H1 ; Define tool 0
G10 P0 X0 Y0 Z0 ; Set tool 0 axis offsets
G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C

; Network
M550 PIanCorexy ; Set machine name
M551 PIcorexy ; Set password ;
M552 P0.0.0.0 S1 ; Enable network and acquire dynamic address via DHCP

; Fans
M106 P0 S0.3 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P1 S1 I0 F500 H-1 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P2 S1 I0 F500 H-1 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned off

;Zprobe bltouch

; Custom settings are not configured
}

ok so everything is now unplugged, completely, Now the 3.3v led is green and it is communicating with pronterface. Thank you very much. My guess is that I had an endstop plugged in improperly and it was shorting out the 3v rail. Does that seem about right?

ok when I plug in only the USB, i get a 5v light and the light between the reset button and the USB socket. Is there some jumper or something that I need to move to get it to work? And yes I unplugged the connections to the main board.

I have been using my duet wifi for a few months now and it has worked well. I recently tried to setup the duex5 with my printer, but during the process, I made some mistake. I am not sure where I went wrong, but now my board isn't functioning properly. I may have pressed the erase button during the process, I am not sure. It is possible i have messed up in some other way. I have tried to reflash the board with Sa-mba, but I can't even get the Bossa port to show up in device manager. I also had checked for the other comm port to connect through pronterface, and that wouldn't appear either. I tried a different usb cable.

I apologize for the vagary of this post, but I'm honestly not sure where I went wrong.

Thanks,
Ian