# Support & Troubleshooting **URL:** https://forum.liquidinstruments.com/c/support-and-troubleshooting/13.md?page=4 [Latest](https://forum.liquidinstruments.com/latest.md) · [Categories](https://forum.liquidinstruments.com/categories.md) **Page:** 5 --- ## [Programmable Power Suppy 'bug'?](https://forum.liquidinstruments.com/t/programmable-power-suppy-bug/954)
**Author:** [@brucat](https://forum.liquidinstruments.com/u/brucat)\ **Replies:** 6\ **Last updated:** [September 24, 2025, 10:01pm UTC](https://forum.liquidinstruments.com/t/programmable-power-suppy-bug/954 "2025-09-24T22:01:57Z")
All, I am using a Moku:Go with programmable power supplies: ‘firmware’: 591, ‘hardware’: ‘Moku:Go’, ‘version’: ‘3.2’ When I use PPS ID 3 or 4 to drive a load. it sometimes doesn’t ‘turn on’ until I unplug and replug… --- ## [Basic Datalogger (Exception occured: time\_to\_end)](https://forum.liquidinstruments.com/t/basic-datalogger-exception-occured-time-to-end/950)
**Author:** [@Saman](https://forum.liquidinstruments.com/u/Saman)\ **Replies:** 3\ **Last updated:** [May 2, 2024, 11:54pm UTC](https://forum.liquidinstruments.com/t/basic-datalogger-exception-occured-time-to-end/950 "2024-05-02T23:54:43Z")
Hi, I am using the code on the website liquid instruments for basic datalogger. I use moku:lab and the error is: Exception occured: time\_to\_end. Here is the link to the code: Examples for Python | Moku API I ist worth… --- ## [CAN protocol with Moku Go hardware](https://forum.liquidinstruments.com/t/can-protocol-with-moku-go-hardware/949)
**Author:** [@prashanthekambe](https://forum.liquidinstruments.com/u/prashanthekambe)\ **Replies:** 1\ **Last updated:** [May 9, 2024, 12:47am UTC](https://forum.liquidinstruments.com/t/can-protocol-with-moku-go-hardware/949 "2024-05-09T00:47:30Z")
we are unable to decode CAN data from Moku Go hardware, looking for a support --- ## [Data Logger in multi-instruments mode](https://forum.liquidinstruments.com/t/data-logger-in-multi-instruments-mode/947)
**Author:** [@vcodrin2000](https://forum.liquidinstruments.com/u/vcodrin2000)\ **Replies:** 6\ **Last updated:** [June 11, 2025, 6:55pm UTC](https://forum.liquidinstruments.com/t/data-logger-in-multi-instruments-mode/947 "2025-06-11T18:55:32Z")
Hello guys, I have been trying to set-up Moku-Go in Matlab in multi-mode with an arbitrary waveform generator and a data-logger. I am trying to log the data from one of the outputs and from one input. The problem is tha… --- ## [Issues with Moku GO using in Labview (IP address)](https://forum.liquidinstruments.com/t/issues-with-moku-go-using-in-labview-ip-address/945)
**Author:** [@Sushiki](https://forum.liquidinstruments.com/u/Sushiki)\ **Replies:** 17\ **Last updated:** [May 22, 2025, 4:28pm UTC](https://forum.liquidinstruments.com/t/issues-with-moku-go-using-in-labview-ip-address/945 "2025-05-22T16:28:21Z")
I have met something with using Moku GO with Labview. I have entered IP address, which I have used same address well in Python. However, in Labview, it report Error message code 54. I am not sure how to solve this proble… --- ## [Error with enable\_rollmode, enable\_output and get\_data](https://forum.liquidinstruments.com/t/error-with-enable-rollmode-enable-output-and-get-data/942)
**Author:** [@JamesStuart](https://forum.liquidinstruments.com/u/JamesStuart)\ **Replies:** 2\ **Last updated:** [April 26, 2024, 1:42am UTC](https://forum.liquidinstruments.com/t/error-with-enable-rollmode-enable-output-and-get-data/942 "2024-04-26T01:42:14Z")
Hello, I have noticed an interesting error with our Moku:Go using the Python API Model: Moku:Go Operating system: windows software: 3.2.0 fireware: 591 I can replicate the bug with the following code. I open the P… --- ## [Mokucli 2.2.2 does not exist for Linux](https://forum.liquidinstruments.com/t/mokucli-2-2-2-does-not-exist-for-linux/940)
**Author:** [@P-wilt](https://forum.liquidinstruments.com/u/P-wilt)\ **Replies:** 1\ **Last updated:** [April 22, 2024, 4:27am UTC](https://forum.liquidinstruments.com/t/mokucli-2-2-2-does-not-exist-for-linux/940 "2024-04-22T04:27:04Z")
\*\*Moku model: Moku Lab \*\* Operating system: Linux Software version: 3.2.0 Firmware 591 Mokucli 2.2.2 does not appear to exist for linux, only 2.2.1 can be downloaded from the utilities website. When I try to run any s… --- ## [Issues updating Moku:Lab firmware](https://forum.liquidinstruments.com/t/issues-updating-moku-lab-firmware/939)
**Author:** [@mapelleg](https://forum.liquidinstruments.com/u/mapelleg)\ **Replies:** 6\ **Last updated:** [April 26, 2024, 2:06am UTC](https://forum.liquidinstruments.com/t/issues-updating-moku-lab-firmware/939 "2024-04-26T02:06:47Z")
Moku model: Moku:Lab Operating system: Windows Software version: 3.2.0, firmware 516 Hello, I am attempting to update a Moku:Lab to firmware version 591. I tried to do this through the Moku windows software, though a… --- ## [Digital filter box control matrix](https://forum.liquidinstruments.com/t/digital-filter-box-control-matrix/937)
**Author:** [@jephwack](https://forum.liquidinstruments.com/u/jephwack)\ **Replies:** 1\ **Last updated:** [April 18, 2024, 5:22pm UTC](https://forum.liquidinstruments.com/t/digital-filter-box-control-matrix/937 "2024-04-18T17:22:01Z")
Moku model: Pro Software version: Moku v3.2.0 (build4134), firmware 591 Bug or support request description: Hello, the API documentation specifies that the numbers in the control matrix are gains measured in decibels,… --- ## [Monitoring Filtered Signal in Lock-In Instrument with PID](https://forum.liquidinstruments.com/t/monitoring-filtered-signal-in-lock-in-instrument-with-pid/934)
**Author:** [@wtobias](https://forum.liquidinstruments.com/u/wtobias)\ **Replies:** 2\ **Last updated:** [April 16, 2024, 3:27pm UTC](https://forum.liquidinstruments.com/t/monitoring-filtered-signal-in-lock-in-instrument-with-pid/934 "2024-04-16T15:27:54Z")
Hi, I am using a Moku:Lab, version 3.1. In the lock-in amplifier instrument, is there a natural way to probe the demodulated and filtered signal (i.e., error signal) when the PID controller option is engaged? I have atta… --- ## [AWG frequency error/offset](https://forum.liquidinstruments.com/t/awg-frequency-error-offset/924)
**Author:** [@nnosk55](https://forum.liquidinstruments.com/u/nnosk55)\ **Replies:** 4\ **Last updated:** [March 30, 2024, 1:16am UTC](https://forum.liquidinstruments.com/t/awg-frequency-error-offset/924 "2024-03-30T01:16:47Z")
Moku model: Moku Pro Operating system: Windows \*\*Software version: 3.1.2, firmware 587 Bug/support request description: Apologies, this is maybe a niche bug. It seems that there is a small frequency offset/error bet… --- ## [Web interface access](https://forum.liquidinstruments.com/t/web-interface-access/922)
**Author:** [@admitrieff](https://forum.liquidinstruments.com/u/admitrieff)\ **Replies:** 1\ **Last updated:** [March 27, 2024, 6:03am UTC](https://forum.liquidinstruments.com/t/web-interface-access/922 "2024-03-27T06:03:25Z")
Hi all, Quick question: is it possible to limit access to the web interfaces provided by Moku devices somehow, e.g. with a password or any other authorisation method, without using external tools for network administrat… --- ## [Controlling multiple Moku devices with the desktop app](https://forum.liquidinstruments.com/t/controlling-multiple-moku-devices-with-the-desktop-app/914)
**Author:** [@admitrieff](https://forum.liquidinstruments.com/u/admitrieff)\ **Replies:** 1\ **Last updated:** [March 7, 2024, 4:31pm UTC](https://forum.liquidinstruments.com/t/controlling-multiple-moku-devices-with-the-desktop-app/914 "2024-03-07T16:31:55Z")
Hi all, This help page suggests that there should be a way to control several devices from the same workstation PC. However, we don’t see the “tabs” in the latest version of the Moku app, nor can we open more than one i… --- ## [Is it possible to "force trigger" the AWG in Burst Mode?](https://forum.liquidinstruments.com/t/is-it-possible-to-force-trigger-the-awg-in-burst-mode/912)
**Author:** [@coolehs](https://forum.liquidinstruments.com/u/coolehs)\ **Replies:** 3\ **Last updated:** [March 30, 2024, 1:18am UTC](https://forum.liquidinstruments.com/t/is-it-possible-to-force-trigger-the-awg-in-burst-mode/912 "2024-03-30T01:18:09Z")
I’d like to generate synchronised pulses on the two channels of the AWG every time a button is clicked in a custom GUI. Is it possible to “force trigger” the AWG by software command, without having to involve an external… --- ## [Unknown exception. Status code:504 in Moku Pro](https://forum.liquidinstruments.com/t/unknown-exception-status-code-504-in-moku-pro/908)
**Author:** [@bonhardt](https://forum.liquidinstruments.com/u/bonhardt)\ **Replies:** 7\ **Last updated:** [March 6, 2024, 5:17pm UTC](https://forum.liquidinstruments.com/t/unknown-exception-status-code-504-in-moku-pro/908 "2024-03-06T17:17:15Z")
Moku model: Moku Pro Operating system: Ubuntu Software version: 587 Bug or support request description: I have tried Multi-instrument mode in Moku and I keep getting ‘Unknown exception. Status code:504’ error. I am u… --- ## [Multiple Moku:Go at the same time](https://forum.liquidinstruments.com/t/multiple-moku-go-at-the-same-time/906)
**Author:** [@minodori](https://forum.liquidinstruments.com/u/minodori)\ **Replies:** 1\ **Last updated:** [February 26, 2024, 11:31pm UTC](https://forum.liquidinstruments.com/t/multiple-moku-go-at-the-same-time/906 "2024-02-26T23:31:44Z")
Hi, When I connect 2 moku:go instruments to my desktop, I found the two moku:go are on the workspace on App. It seems that connects to one device at a time. As you know, Moku:go has 2 input / 2 output channels only, … --- ## [PID transfer functions](https://forum.liquidinstruments.com/t/pid-transfer-functions/905)
**Author:** [@jephwack](https://forum.liquidinstruments.com/u/jephwack)\ **Replies:** 1\ **Last updated:** [February 26, 2024, 11:23pm UTC](https://forum.liquidinstruments.com/t/pid-transfer-functions/905 "2024-02-26T23:23:35Z")
I am trying to reproduce the transfer functions of the PID controllers. I am running into difficulties in some parameter regimes, for example when the integrator saturation frequency is close to the the proportional gain… --- ## [Moku:Pro Datalogger: Max. stream duration?](https://forum.liquidinstruments.com/t/moku-pro-datalogger-max-stream-duration/904)
**Author:** [@hschill](https://forum.liquidinstruments.com/u/hschill)\ **Replies:** 4\ **Last updated:** [April 8, 2024, 6:21am UTC](https://forum.liquidinstruments.com/t/moku-pro-datalogger-max-stream-duration/904 "2024-04-08T06:21:53Z")
I want to use the Moku:Pro to calculate the histogram of an input signal during \>12h of continuos testing. The sample rate has to be \>500kSa/S, so we’re looking at \>20 GSa in total. There may be no missed samples. Apart … --- ## [Persistence of Instrument Configuration when Switching from API to GUI](https://forum.liquidinstruments.com/t/persistence-of-instrument-configuration-when-switching-from-api-to-gui/900)
**Author:** [@jephwack](https://forum.liquidinstruments.com/u/jephwack)\ **Replies:** 1\ **Last updated:** [February 20, 2024, 5:17pm UTC](https://forum.liquidinstruments.com/t/persistence-of-instrument-configuration-when-switching-from-api-to-gui/900 "2024-02-20T17:17:05Z")
Here is a script which configures a PIDController in MultiInstrument mode from moku.instruments import MultiInstrument, PIDController MIM = MultiInstrument(‘XXX.XXX.XXX.XXX’, force\_connect=True, platform\_id=4) PID = … --- ## [LaserLockBox in MultiInstrument](https://forum.liquidinstruments.com/t/laserlockbox-in-multiinstrument/899)
**Author:** [@jephwack](https://forum.liquidinstruments.com/u/jephwack)\ **Replies:** 3\ **Last updated:** [February 23, 2024, 7:02am UTC](https://forum.liquidinstruments.com/t/laserlockbox-in-multiinstrument/899 "2024-02-23T07:02:28Z")
I would like to set the output port of the demodulation signal of a LaserLockBox in MultiInstrument mode. The following code from moku.instruments import MultiInstrument, LaserLockBox MIM = MultiInstrument(‘XXX.XXX.XX… --- ## [Acquisition times out at Moku:Pro Oscilloscope](https://forum.liquidinstruments.com/t/acquisition-times-out-at-moku-pro-oscilloscope/897)
**Author:** [@xprox](https://forum.liquidinstruments.com/u/xprox)\ **Replies:** 1\ **Last updated:** [February 15, 2024, 11:47pm UTC](https://forum.liquidinstruments.com/t/acquisition-times-out-at-moku-pro-oscilloscope/897 "2024-02-15T23:47:00Z")
When trying to acquire a single period of a waveform, e.g. sine wave, that’s 1 us long (1 MHz), 4 Vpp where trigger level is set to the half the Vp, the oscilloscope times out due to no acquisition. However, this does no… --- ## [FRA problem in Low FREQ](https://forum.liquidinstruments.com/t/fra-problem-in-low-freq/890)
**Author:** [@Hyeon\_Woo\_Park](https://forum.liquidinstruments.com/u/Hyeon_Woo_Park)\ **Replies:** 2\ **Last updated:** [January 31, 2024, 4:49pm UTC](https://forum.liquidinstruments.com/t/fra-problem-in-low-freq/890 "2024-01-31T16:49:04Z")
Hi! I have little bit promlem in Moku:go FRA Python API (hardware: Moku: Go) I’d like to see the frequency response of the LPF. But Python returned nan data I think FRA doesn’t support under the 100Hz or my code does… --- ## [Bug: oscilloscope on Moku:Go returns incomplete data arrays with trailing NoneTypes for frame\_lenghts \> 2048](https://forum.liquidinstruments.com/t/bug-oscilloscope-on-moku-go-returns-incomplete-data-arrays-with-trailing-nonetypes-for-frame-lenghts-2048/884)
**Author:** [@dhwielens](https://forum.liquidinstruments.com/u/dhwielens)\ **Replies:** 7\ **Last updated:** [July 23, 2024, 9:28pm UTC](https://forum.liquidinstruments.com/t/bug-oscilloscope-on-moku-go-returns-incomplete-data-arrays-with-trailing-nonetypes-for-frame-lenghts-2048/884 "2024-07-23T21:28:44Z")
Moku model: Go M1 (Hardware version 4.0) Operating system: Windows 11 Software version: Python API: 3.1.1, Moku:Go fw=587 Hi, I’m testing a simple setup on the Moku:Go with the Python API where the MIM has a waveform… --- ## [Peak around 800kHz in FRA](https://forum.liquidinstruments.com/t/peak-around-800khz-in-fra/882)
**Author:** [@minodori](https://forum.liquidinstruments.com/u/minodori)\ **Replies:** 3\ **Last updated:** [January 23, 2024, 9:55pm UTC](https://forum.liquidinstruments.com/t/peak-around-800khz-in-fra/882 "2024-01-23T21:55:14Z")
HI, When I testing Moku:go’s FRA, I found that the signal strength increased more than 20dB and the phase was reversed around 800 kHz(a peak) in FRA without any signal inputs. I just curious about why I can found the p… --- ## [Oscilloscope measurement data download using Python API](https://forum.liquidinstruments.com/t/oscilloscope-measurement-data-download-using-python-api/873)
**Author:** [@steven](https://forum.liquidinstruments.com/u/steven)\ **Replies:** 1\ **Last updated:** [December 26, 2023, 6:13am UTC](https://forum.liquidinstruments.com/t/oscilloscope-measurement-data-download-using-python-api/873 "2023-12-26T06:13:47Z")
Moku model: moku:Go Operating system: Windows 10 Software version: 3.11 Bug or support request description: Can I download the Oscilloscope measurements (such as frequency, peak to peak, A-B, etc) using Python API? … --- ## [Download fail moku data files](https://forum.liquidinstruments.com/t/download-fail-moku-data-files/868)
**Author:** [@minodori](https://forum.liquidinstruments.com/u/minodori)\ **Replies:** 3\ **Last updated:** [December 21, 2023, 2:25am UTC](https://forum.liquidinstruments.com/t/download-fail-moku-data-files/868 "2023-12-21T02:25:45Z")
Hi, I have got below message when i run ‘moku download’. PS D:\\PythonProject\\Moku\> moku download Moku Client Version 3.1.1 ERROR: Unexpected error. HTTPSConnectionPool(host=‘updates.liquidinstruments.com’, port=443)… --- ## [Dividing Input Signals and Sending Quotient to Output Port with Moku:Pro](https://forum.liquidinstruments.com/t/dividing-input-signals-and-sending-quotient-to-output-port-with-moku-pro/860)
**Author:** [@J-Hirsch](https://forum.liquidinstruments.com/u/J-Hirsch)\ **Replies:** 2\ **Last updated:** [September 18, 2024, 2:28am UTC](https://forum.liquidinstruments.com/t/dividing-input-signals-and-sending-quotient-to-output-port-with-moku-pro/860 "2024-09-18T02:28:58Z")
Hello, I have been experimenting with my Moku:Pro device and I’ve successfully managed to divide two input signals using the oscilloscope feature. However, I am now facing a challenge in sending the quotient to one of t… --- ## [Moku Go version 3.1.1 error](https://forum.liquidinstruments.com/t/moku-go-version-3-1-1-error/857)
**Author:** [@Koki](https://forum.liquidinstruments.com/u/Koki)\ **Replies:** 3\ **Last updated:** [March 18, 2024, 6:13pm UTC](https://forum.liquidinstruments.com/t/moku-go-version-3-1-1-error/857 "2024-03-18T18:13:40Z")
I updated my Moku Go and Matlab API to version 3.1.1 today and am having problems. Below is the program code and error. Please let me know how I can fix this problem. Or please tell me how to revert Moku Go and Matlab… --- ## [Python API bug: "Moku 502 Error" when relinquish\_ownership()](https://forum.liquidinstruments.com/t/python-api-bug-moku-502-error-when-relinquish-ownership/856)
**Author:** [@nnosk55](https://forum.liquidinstruments.com/u/nnosk55)\ **Replies:** 3\ **Last updated:** [December 5, 2023, 4:03am UTC](https://forum.liquidinstruments.com/t/python-api-bug-moku-502-error-when-relinquish-ownership/856 "2023-12-05T04:03:41Z")
Moku model: Moku Pro, Firmware 587 Operating system: Mac OS Ventura 13.4.1 Software version: Moku 3.1.0, Mokucli 2.2.1 The following combination of settings causes a 502 error when trying to relinquish\_ownership() of … --- ## [Issues with python+moku:go+Oscilloscope](https://forum.liquidinstruments.com/t/issues-with-python-moku-go-oscilloscope/853)
**Author:** [@Ben](https://forum.liquidinstruments.com/u/Ben)\ **Replies:** 2\ **Last updated:** [December 4, 2023, 1:01pm UTC](https://forum.liquidinstruments.com/t/issues-with-python-moku-go-oscilloscope/853 "2023-12-04T13:01:13Z")
\*\*Moku model:go \*\*Operating system:macOS sonoma \*\*Software version:14.1.1 Bug or support request description: been tryin to run this: " from moku.instruments import Oscilloscope osc = Oscilloscope(‘\[fe80::7269:… [Previous page](https://forum.liquidinstruments.com/c/support-and-troubleshooting/13.md?page=3) [Next page](https://forum.liquidinstruments.com/c/support-and-troubleshooting/13.md?page=5)