Tools can fail for many reasons. Sometimes this is related to input formatting problems and sometimes because of data content and/or parameters.
MACS2 often fails this way due to data content. If you click on the Job Details icon within the failed dataset ("i" icon), then click on either
stdout on the report, the full error details can be reviewed. This is the end of your error (thanks for the bug report!) and is common when there were upstream mapping problems (resulting in low mapping rates) or settings made with MACS2 that do not fit the data well. (I didn't post anything private here - this is the same error that many receive under similar circumstances).
WARNING @ Wed, 11 Apr 2018 10:33:13: Too few paired peaks (0) so I can not build the model! Broader your MFOLD range parameter may erase this error. If it still can't build the model, we suggest to use --nomodel and --extsize 147 or other fixed number instead. WARNING @ Wed, 11 Apr 2018 10:33:13: Process for pairing-model is terminated!
The MACS2 manual and google group are the best resources for learning how to tune parameters.
Your inputs were purged already, so I cannot double check those, but the troubleshooting help here may help: https://galaxyproject.org/support/#troubleshooting. I would suggest checking the quality of the fastq reads (FastQC) and the mapping rates first to eliminate those as issues. Once those are confirmed, then go forward with testing different MACS2 parameters for a successful job.
Galaxy tutorials for ChIP-seq, fastq QA/QC, and other protocols: https://galaxyproject.org/learn/
Thanks! Jen, Galaxy team