Workflow failed

Hello,

I am submitting jobs in the firecloud with the five-dollar-genome-analysis-pipeline. One of my job failed in the germline_single_sample_workflow.SplitRG step. Here is the error message.

message: Call input and runtime attributes evaluation failed for GatherMonolithicBamFile
causedBy:
message: No coercion defined from '257' of type 'Int' to 'Float'.

Could anyone help to check this error?

Thanks,
Qiang