Unable to retrieve skills from server / Unable to parse XML from response: java.lang.String cannot be cast to java.lang.intege.....

If you receive this error message in the UR polyscope, there is a communication error between the robot and the MIRAI controller.

Troubleshooting

URCap

Did you recently receive a software update from us or did you do it yourself via USB? If so, please check if you have also updated the URCap in Polyscope.

• These two articles can help you with this:
  • Installing URCaps
  • MIRAI Software Version & URCap Compatibility

Network configuration / wiring

• Please check if anything has changed in the network settings of your robot and the MIRAI app. You can see the default configuration here: Network Settings - IP Addresses
• Check if the cabling of all components is correct, also check the fit of the cables. Is the Ethernet switch turned on? MIRAI Controller Installation Guide

If these steps do not help, please contact our customer service using the "Submit Request" button on this page.