Error following samclip and bam_sort_core

[mweberr]

Hi, I am using Snippy on a HPC and all samples run into error after the samclip, bam_sort_core.
Any idea what might by the source of the error ?

Snippy Version 4.6.0

[main] CMD: bwa mem -Y -M -R @RG\tID:21E0505\tSM:21E0505 -t 16 reference/ref.fa 
[main] Real time: 97.898 sec; CPU: 924.259 sec
[samclip] Total SAM records 12468302, removed 2178195, allowed 220479, passed 10290107
[samclip] Header contained 4 lines
[samclip] Done.
[bam_sort_core] merging from 0 files and 7 in-memory blocks...
[bam_sort_core] merging from 0 files and 7 in-memory blocks...
**[16:11:52] Error running command, check results/snippy/sample/snps.log**