Error using ROS custom messages add-on

Hi all,

I have just installed the ROS custom message add-on to the Robotics System Toolbox, and it seems to be broken - when I run rosgenmsg(folderpath), I get the error message:

"Undefined variable "hwconnectinstaller" or class "hwconnectinstaller.PackageInfo".

Error in robotics.ros.custommsg.internal.SupportPackage

Error in robotics.ros.custommsg.internal.setup.registerMessageCatalog (line 9) spPkg = robotics.ros.custommsg.internal.SupportPackage;

Error in rosgenmsg (line 33) robotics.ros.custommsg.internal.setup.registerMessageCatalog;"

I noticed another person with an identical problem commenting on the add-on 2 days ago. Does anyone know how to fix this please?

[MathWorks Robotics and Autonomous Systems Team]

Can you confirm if you followed step by step guide on this page:

https://www.mathworks.com/help/robotics/ug/create-custom-messages-from-ros-package.html

And still see the issue.

I would also try to reinstall the addon - seems the addon is not configured correctly.

[Michael Friedman]

I have followed the step by step guide, and have uninstalled and reinstalled the add-on twice now, and still get the same error message...

[Michael Friedman]

I uninstalled and reinstalled the add-on for the third time now and am still having the same issue, but noticed the following error message during installation if this helps:

"Warning: Could not open the ROS Custom Message documentation. See the "Custom Message Support" section in the Robotics System Toolbox documentation.

Detailed error report: Undefined variable "hwconnectinstaller" or class "hwconnectinstaller.PackageInfo".

Error in robotics.ros.custommsg.internal.SupportPackage

Error in robotics.ros.custommsg.internal.setup.registerMessageCatalog (line 9) spPkg = robotics.ros.custommsg.internal.SupportPackage;

Error in robotics.ros.custommsg.internal.setup.postInstallCmd (line 14) robotics.ros.custommsg.internal.setup.registerMessageCatalog;

Error in matlabshared.supportpkg.internal.ssi.util.evaluateCmd

Error in matlabshared.supportpkg.internal.ssi.executePostInstallForBaseCode > In robotics.ros.custommsg.internal.setup.postInstallCmd (line 18) In matlabshared.supportpkg.internal.ssi.util.evaluateCmd In matlabshared.supportpkg.internal.ssi.executePostInstallForBaseCode"

[MathWorks Robotics and Autonomous Systems Team]

Can you please inform the following: - what MATLAB release are you using? - Are you able to run this to get any information:

>>which hwconnectinstaller.PackageInfo

[Michael Friedman]

It's MATLAB 2017b, and that command unfortunately leads to "'hwconnectinstaller.PackageInfo' not found"...

[MathWorks Robotics and Autonomous Systems Team]

Thanks Michael, for the information. We are working on a fix to this issue and will make it available soon. Sorry for the inconvenience.

Answer 1

[MathWorks Robotics and Autonomous Systems Team]

Ok I am glad to announce that we fixed the issue in our product, and there is a new version for the addon 17.2.1 present.

On MATLAB from R2017b, >> roboticsAddons

Update your ROS Custom Message addon.

or can use MATLAB Home tab Add-ons > Manage Add-ons