# Unhandled Exception in URCap

**URL:** <https://forum.universal-robots.com/t/unhandled-exception-in-urcap/40864>\
**Category:** Technical Questions\
**Created:** [August 18, 2025, 7:59pm UTC](https://forum.universal-robots.com/t/unhandled-exception-in-urcap/40864 "2025-08-18T19:59:53Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![eric.feldmann](https://avatars.discourse-cdn.com/v4/letter/e/94ad74/32.png) [@eric.feldmann](https://forum.universal-robots.com/u/eric.feldmann)\
**Post date:** [August 18, 2025, 10:05pm UTC](https://forum.universal-robots.com/t/unhandled-exception-in-urcap/40864/2 "2025-08-18T22:05:58Z")

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Are you using any sub programs in there? The palletizing node seems to struggle with subprograms or Installation variables. It’ll work until you save and try to re-open the program. I rarely use it, and opt to instead programmatically shift the Features around myself. ([Palletizing in subprograms causes null pointers](https://forum.universal-robots.com/t/palletizing-in-subprograms-causes-null-pointers/30553))

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