# Unable to load the URcap file **URL:** \ **Category:** ROS\ **Created:** [July 30, 2022, 12:10pm UTC](https://forum.universal-robots.com/t/unable-to-load-the-urcap-file/23002 "2022-07-30T12:10:13Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![anon94991824](https://avatars.discourse-cdn.com/v4/letter/a/51bf81/32.png) [@anon94991824](https://forum.universal-robots.com/u/anon94991824)\ **Post date:** [July 30, 2022, 12:10pm UTC](https://forum.universal-robots.com/t/unable-to-load-the-urcap-file/23002/1 "2022-07-30T12:10:13Z")
Hello, I am a PhD student and I would need support regarding a UR5. I need to connect my UR5 with a PC having ros noetic and I am following the guide: [GitHub - UniversalRobots/Universal\_Robots\_ROS\_Driver: Universal Robots ROS driver supporting CB3 and e-Series](https://github.com/UniversalRobots/Universal_Robots_ROS_Driver). I am having some troubles in installing the `URCap` (I’m following this guide here: [Universal\_Robots\_ROS\_Driver/install\_urcap\_cb3.md at master · UniversalRobots/Universal\_Robots\_ROS\_Driver · GitHub](https://github.com/UniversalRobots/Universal_Robots_ROS_Driver/blob/master/ur_robot_driver/doc/install_urcap_cb3.md)) In detail, after plugging the USB driver to the UR5 setup and restart it, there seems that the driver is not correctly loaded. The following image represents what I have ![WhatsApp Image 2022-07-30 at 13.49.58(1)](https://us1.discourse-cdn.com/flex020/uploads/universal_robots/original/2X/4/45deb24f9ad0f041ebefa72728a78d75592ee03e.jpeg) Could you please help me? Thank you very much! ---
**Author:** ![mauch](https://avatars.discourse-cdn.com/v4/letter/m/71e660/32.png) [@mauch](https://forum.universal-robots.com/u/mauch)\ **Post date:** [August 1, 2022, 8:47am UTC](https://forum.universal-robots.com/t/unable-to-load-the-urcap-file/23002/2 "2022-08-01T08:47:35Z")
Once you click on the “External Control” Entry, the information box below should show some information. Without that it is hard to tell what’s wrong. ---
**Author:** ![cags](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.universal-robots.com/cags/32/6304_2.png) [@cags](https://forum.universal-robots.com/u/cags)\ **Post date:** [August 1, 2022, 10:17am UTC](https://forum.universal-robots.com/t/unable-to-load-the-urcap-file/23002/3 "2022-08-01T10:17:47Z")
Review your URCap version and details. URCaps are meant to be used with certain Polyscope versions. It might be that your UR Polyscope version is incompatible with this URCap version specifically. ---
**Author:** ![anon94991824](https://avatars.discourse-cdn.com/v4/letter/a/51bf81/32.png) [@anon94991824](https://forum.universal-robots.com/u/anon94991824)\ **Post date:** [August 3, 2022, 11:02am UTC](https://forum.universal-robots.com/t/unable-to-load-the-urcap-file/23002/4 "2022-08-03T11:02:51Z")
Hi Mauch, thank you for answering to my question. Here the info that I get when i click on the external control icon. ![WhatsApp Image 2022-08-03 at 13.02.00](https://us1.discourse-cdn.com/flex020/uploads/universal_robots/original/2X/6/6e83c55c18bf9a826cc37b8e790c5ffcd2e6ae6c.jpeg) ---
**Author:** ![anon94991824](https://avatars.discourse-cdn.com/v4/letter/a/51bf81/32.png) [@anon94991824](https://forum.universal-robots.com/u/anon94991824)\ **Post date:** [August 3, 2022, 11:03am UTC](https://forum.universal-robots.com/t/unable-to-load-the-urcap-file/23002/5 "2022-08-03T11:03:48Z")
Moreover, here the error that I have when I try to launch the robot ![WhatsApp Image 2022-07-30 at 13.49.57](https://us1.discourse-cdn.com/flex020/uploads/universal_robots/original/2X/7/7d6a3ff3a394bae33ee47da128588a4d8ba4ad87.jpeg) ---
**Author:** ![anon94991824](https://avatars.discourse-cdn.com/v4/letter/a/51bf81/32.png) [@anon94991824](https://forum.universal-robots.com/u/anon94991824)\ **Post date:** [August 3, 2022, 11:04am UTC](https://forum.universal-robots.com/t/unable-to-load-the-urcap-file/23002/6 "2022-08-03T11:04:53Z")
Hi, Thank you for answering me. Do you know how to check which Polyscope version I have?Sorry for the question but I’m very knew to UR5 ---
**Author:** ![mauch](https://avatars.discourse-cdn.com/v4/letter/m/71e660/32.png) [@mauch](https://forum.universal-robots.com/u/mauch)\ **Post date:** [September 9, 2022, 1:48pm UTC](https://forum.universal-robots.com/t/unable-to-load-the-urcap-file/23002/7 "2022-09-09T13:48:37Z")
If you boot your robot and enter the Setup it should show the robot version there. ![image](https://us1.discourse-cdn.com/flex020/uploads/universal_robots/original/2X/0/0f1662c43f7615284c70416a93d247ac8d65d155.png) The example shown above shows a robot running Polyscope 3.15.