# Aux mixer not loading **URL:** \ **Category:** PX4 Autopilot\ **Created:** [June 30, 2016, 1:54pm UTC](https://discuss.px4.io/t/aux-mixer-not-loading/646 "2016-06-30T13:54:46Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![blankered](https://discuss.px4.io/letter_avatar_proxy/v4/letter/b/3d9bf3/32.png) [@blankered](https://discuss.px4.io/u/blankered)\ **Post date:** [June 30, 2016, 1:54pm UTC](https://discuss.px4.io/t/aux-mixer-not-loading/646/1 "2016-06-30T13:54:46Z")
I am trying to build an aux mixer to send basic throttle to AUX 1. I successfully run the configuration by making changes to pass.aux.mix. I then copied and renamed the configuration to reaper.aux.mix. When I run my configuration script calling on the reaper.aux.mix, it does not load /dev/pwm\_outputs1 or the aux mixer. Here is the successful output: `nsh> sercon: Registering CDC/ACM serial driver sercon: Successfully registered the CDC/ACM serial driver WARN [param] selected parameter default file /fs/mtd_params rgbled on I2C bus 2 at 0x55 (bus: 100 KHz, max: 100 KHz) WARN [px4io] CRCs match INFO [dataman] Power on restart, data manager file '/fs/microsd/dataman' size is 103090 bytes MS5611_SPI on SPI bus 1 at 3 (20000 KHz) WARN [bst] no devices found INFO [ver] match: PX4FMU_V2 WARN [hmc5883] no device on bus 2 read_reg failWARN [lis3mdl] no device on bus 2 WARN [hmc5883] no device on bus 1 ERROR [mpu6000] no device on this bus MPU6000 on SPI bus 1 at 4 (1000 KHz) L3GD20 on SPI bus 1 at 1 (11000 KHz) LSM303D on SPI bus 1 at 2 (11000 KHz) ERROR [meas_airspeed] no MS4525 airspeed sensor connected ERROR [ets_airspeed] no ETS airspeed sensor connected ERROR [ets_airspeed] no ETS airspeed sensor connected nsh: sf10a: command not found INFO [px4io] default PWM output device INFO [mavlink] mode: Normal, data rate: 1200 B/s on /dev/ttyS1 @ 57600B INFO [mavlink] mode: OSD, data rate: 1000 B/s on /dev/ttyS2 @ 57600B INFO [ver] match: PX4FMU_V2 px4flow [175:100] WARN [px4flow] scanning I2C buses for device.. INFO [mavlink] mode: Config, data rate: 800000 B/s on /dev/ttyACM0 @ 57600B WARN [param] Error: Parameter EKF2_REC_RPL not found. INFO [init] Multicopter INFO [init] Mixer: /etc/mixers/quad_h.main.mix on /dev/pwm_output0 INFO [init] Mixer: /etc/mixers/pass.aux.mix on /dev/pwm_output1` Here is the output of running the new file, reaper.aux.mix which is a copy of pass.aux.mix `nsh> WARN [mavlink] Disabling hardware flow control sercon: Registering CDC/ACM serial driver sercon: Successfully registered the CDC/ACM serial driver WARN [param] selected parameter default file /fs/mtd_params rgbled on I2C bus 2 at 0x55 (bus: 100 KHz, max: 100 KHz) WARN [px4io] CRCs match INFO [dataman] Power on restart, data manager file '/fs/microsd/dataman' size is 103090 bytes MS5611_SPI on SPI bus 1 at 3 (20000 KHz) WARN [bst] no devices found INFO [ver] match: PX4FMU_V2 WARN [hmc5883] no device on bus 2 read_reg failWARN [lis3mdl] no device on bus 2 WARN [hmc5883] no device on bus 1 ERROR [mpu6000] no device on this bus MPU6000 on SPI bus 1 at 4 (1000 KHz) L3GD20 on SPI bus 1 at 1 (11000 KHz) LSM303D on SPI bus 1 at 2 (11000 KHz) ERROR [meas_airspeed] no MS4525 airspeed sensor connected ERROR [ets_airspeed] no ETS airspeed sensor connected ERROR [ets_airspeed] no ETS airspeed sensor connected nsh: sf10a: command not found INFO [px4io] default PWM output device INFO [mavlink] mode: Normal, data rate: 1200 B/s on /dev/ttyS1 @ 57600B INFO [mavlink] mode: OSD, data rate: 1000 B/s on /dev/ttyS2 @ 57600B INFO [ver] match: PX4FMU_V2 px4flow [175:100] WARN [px4flow] scanning I2C buses for device.. INFO [mavlink] mode: Config, data rate: 800000 B/s on /dev/ttyACM0 @ 57600B WARN [param] Error: Parameter EKF2_REC_RPL not found. INFO [init] Multicopter INFO [init] Mixer: /etc/mixers/quad_h.main.mix on /dev/pwm_output0 ` I change set MIXER\_AUX pass to set MIXER\_AUX reaper and receive the later results… EDIT: Found the mixer file was not being formatted correctly, by checking the /etc/mixers folder ---
**Author:** ![Maoquan232](https://discuss.px4.io/letter_avatar_proxy/v4/letter/m/9dc877/32.png) [@Maoquan232](https://discuss.px4.io/u/Maoquan232)\ **Post date:** [November 2, 2016, 1:31pm UTC](https://discuss.px4.io/t/aux-mixer-not-loading/646/2 "2016-11-02T13:31:01Z")
hi how did you get the debug information in NSH? you used USB or FDTI or others?