# Long runs stop with error: Waiting

**URL:** <https://datashield.discourse.group/t/long-runs-stop-with-error-waiting/449>\
**Category:** Analyst Support\
**Created:** [20 September 2021 14:23 UTC](https://datashield.discourse.group/t/long-runs-stop-with-error-waiting/449 "2021-09-20T14:23:43Z")\
**Posts on this page:** 1\
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**Author:** ![yannick](https://yyz2.discourse-cdn.com/free1/user_avatar/datashield.discourse.group/yannick/32/19_2.png) [@yannick](https://datashield.discourse.group/u/yannick)\
**Post date:** [20 September 2021 14:52 UTC](https://datashield.discourse.group/t/long-runs-stop-with-error-waiting/449/2 "2021-09-20T14:52:08Z")

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Hi,

That means that the R server session has died, most likely because of (server) memory shortage. That is a common issue when computing with all data in the R memory. Either increase the memory of the (hardware) server. Or find a way to make your computations in a memory efficient way (depends on your data structure, data source, and type of computations). You can also remove the unsused R objects from your server-side R sessions with [ds.rm()](http://datashield.github.io/dsBaseClient/reference/ds.rm.html), to release some memory.

Regards  
Yannick

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