Known Issues

Current changelog can be found at: http://demo.sewio.net/documentation/changelog

For a list of known issues, select your RTLS Studio version:

Related to Virtual Box

Issue: After logging in via web interface, you are greeted by "Whoops, something went wrong".

Source: Unique passwords are set on first boot of Virtual Machine. However, on some machines the passwords are not set correctly, which might result in issue mentioned above.

  • if passwords are set correctly, user is greeted in Virtual Box after login with green status OK:


  • if passwords are set incorrectly:

Fix: Login into Virtual Box's RTLS Studio and initialize setup process again:

    • sudo systemctl enable virtual_box_initializer.service
    • sudo reboot



Issue: Virtual Box cannot boot

Source: multiple reasons, check that

  1. you have latest Virtual Box version
  2. in Virtual Box machine's configuration, tab network, section advanced, you have checked "Cable Connected"
  3. you have virtualization enabled in BIOS: you need to find the “Virtualization VT-x” option and select “enable”. On most computers, this can be found under “Advanced” or “Security” tabs but this option differs depending on your computer. After you have enabled virtualization, save the settings and exit BIOS
  4. [Windows only]Hyper-V is disabled: in start menu search for "Turn windows features on or off" and start it. In the list find Hyper-V - it should look like this:

    and make sure that its turned off like in the  image. Afterwards reboot your computer.

Related to RTLS Manager

Issue: Tables are not updated, e.g. Anchors summary table is stuck on "refreshing" after pressing Refresh Anchors. Or another example - Tags Summary table is not updating.

Source: Reason is that there is filter or sort applied to the table (on the picture below, the table is sorted by Alias)


Fix: disable filter/sort when doing update or refresh

Related to performance

Issue: Rapid performance degradation compared to version without GDOP (<1.6.0). Especially visible in Virtual Box and when low number of cores is available, affecting also native RTLS Studio deployments.

Source: GDOP calculation - only affected in areas where tag could see dozens of anchors, which results in larger space of GDOP combinations (enough to overload CPU, 9 anchors - 84 combs., 10 anchors 210, 11 anchors 462, ...)

Fix:  Apply master restrictions in order to minimize possible GDOP space.

Related to Virtual Box

Issue: After logging in via web interface, you are greeted by "Whoops, something went wrong".

Source: Unique passwords are set on first boot of Virtual Machine. However, on some machines the passwords are not set correctly, which might result in issue mentioned above.

  • if passwords are set correctly, user is greeted in Virtual Box after login with green status OK:


  • if passwords are set incorrectly:

Fixinitialize setup process again:

    • sudo systemctl enable virtual_box_initializer.service
    • sudo reboot




Issue: Virtual Box cannot boot


Source: multiple reasons, check that


  1. you have latest Virtual Box version
  2. in Virtual Box machine's configuration, tab network, section advanced, you have checked "Cable Connected"
  3. you have virtualization enabled in BIOS: you need to find the “Virtualization VT-x” option and select “enable”. On most computers, this can be found under “Advanced” or “Security” tabs but this option differs depending on your computer. After you have enabled virtualization, save the settings and exit BIOS
  4. [Windows only]Hyper-V is disabled: in start menu search for "Turn windows features on or off" and start it. In the list find Hyper-V - it should look like this:

    and make sure that its turned off like in the  image. Afterwards reboot your computer.

Related to RTLS Manager

Issue: Tables are not updated, e.g. Anchors summary table is stuck on "refreshing" after pressing Refresh Anchors. Or another example - Tags Summary table is not updating.

Source: Reason is that there is filter or sort applied to the table (on the picture below, the table is sorted by Alias)


Fix: disable filter/sort when doing update or refresh



Issue: Autodeployment is dysfunctional on specific configuration - running initialization on UDP sync with different profile/channel for sync and blink results in either 0 TWR results or wrong results (depending on profiles). For example: 5 anchors with UDP sync and RF4/5 for sync and RF1/5 for blink

Fix: two options: either set all anchors to TCP sync or set same profile & channel for both blink and sync

Related to performance

Issue: Rapid performance degradation compared to version without GDOP (<1.6.0). Especially visible in Virtual Box and when low number of cores is available, affecting also native RTLS Studio deployments.

Source: GDOP calculation - only affected in areas where tag could see dozens of anchors, which results in larger space of GDOP combinations (enough to overload CPU, 9 anchors - 84 combs., 10 anchors 210, 11 anchors 462, ...)

Fix:  Apply master restrictions in order to minimize possible GDOP space.

Related to Virtual Box

Issue: After logging in via web interface, you are greeted by "Whoops, something went wrong".

Source: Unique passwords are set on first boot of Virtual Machine. However, on some machines the passwords are not set correctly, which might result in issue mentioned above.

  • if passwords are set correctly, user is greeted in Virtual Box after login with green status OK:


  • if passwords are set incorrectly:

Fixinitialize setup process again:

  • sudo systemctl enable virtual_box_initializer.service
  • sudo reboot




Issue: Virtual Box cannot boot


Source: multiple reasons, check that


  1. you have latest Virtual Box version
  2. in Virtual Box machine's configuration, tab network, section advanced, you have checked "Cable Connected"
  3. you have virtualization enabled in BIOS: you need to find the “Virtualization VT-x” option and select “enable”. On most computers, this can be found under “Advanced” or “Security” tabs but this option differs depending on your computer. After you have enabled virtualization, save the settings and exit BIOS
  4. [Windows only]Hyper-V is disabled: in start menu search for "Turn windows features on or off" and start it. In the list find Hyper-V - it should look like this:

    and make sure that its turned off like in the  image. Afterwards reboot your computer.

Related to RTLS Manager


Issue: Tables are not updated, e.g. Anchors summary table is stuck on "refreshing" after pressing Refresh Anchors. Or another example - Tags Summary table is not updating.


Source: Reason is that there is filter or sort applied to the table (on the picture below, the table is sorted by Alias)




Fix: disable filter/sort when doing update or refresh



Issue: Autodeployment is dysfunctional on specific configuration - running initialization on UDP sync with different profile/channel for sync and blink results in either 0 TWR results or wrong results (depending on profiles). For example: 5 anchors with UDP sync and RF4/5 for sync and RF1/5 for blink

Fix: two options: either set all anchors to TCP sync or set same profile & channel for both blink and sync



Issue: Initialization might freeze with higher number of anchors - this can result in RTLS Manager's restart

Source: Autodeployment might run into situation where finding anchors' position is too complex

Fix: update to version at least 2.0.1

Related to performance


Issue: Rapid performance degradation compared to version without GDOP (<1.6.0). Especially visible in Virtual Box and when low number of cores is available, affecting also native RTLS Studio deployments.

Source: GDOP calculation - only affected in areas where tag could see dozens of anchors, which results in larger space of GDOP combinations (enough to overload CPU, 9 anchors - 84 combs., 10 anchors 210, 11 anchors 462, ...)

Fix:  Apply master restrictions in order to minimize possible GDOP space.

Related to Virtual Box


Issue: Virtual Box cannot boot



Source: multiple reasons, check that



  1. you have latest Virtual Box version
  2. in Virtual Box machine's configuration, tab network, section advanced, you have checked "Cable Connected"
  3. you have virtualization enabled in BIOS: you need to find the “Virtualization VT-x” option and select “enable”. On most computers, this can be found under “Advanced” or “Security” tabs but this option differs depending on your computer. After you have enabled virtualization, save the settings and exit BIOS
  4. [Windows only]Hyper-V is disabled: in start menu search for "Turn windows features on or off" and start it. In the list find Hyper-V - it should look like this:

    and make sure that its turned off like in the  image. Afterwards reboot your computer.

Related to RTLS Manager

Issue: Tables are not updated, e.g. Anchors summary table is stuck on "refreshing" after pressing Refresh Anchors. Or another example - Tags Summary table is not updating.

Source: Reason is that there is filter or sort applied to the table (on the picture below, the table is sorted by Alias)

Fix: disable filter/sort when doing update or refresh

Related to API

Issue: Positions endpoint (192.168.225.2/sageserver/positions) works only with parameter per_page = 10000

Fix: Use default value for parameter per_page