bartender_combiner_com gives no output. why?

[L T]

Dear bartender community, 

I am running bartender_combiner_com after extractor_com, single_com and I am taking this message without any output file:

"Running bartender_combiner

Current generation 9"

this is my command: bartender_combiner_com -f day1_barcode_cluster.csv,day1_barcode_quality.csv,day2_barcode_cluster.csv,day2_barcode_quality.csv,day3_barcode_cluster.csv,day3_barcode_quality.csv,day4_barcode_cluster.csv,day4_barcode_quality.csv,day5_barcode_cluster.csv,day5_barcode_quality.csv,day6_barcode_cluster.csv,day6_barcode_quality.csv,day7_barcode_cluster.csv,day7_barcode_quality.csv,day8_barcode_cluster.csv,day8_barcode_quality.csv,day9_barcode_cluster.csv,day9_barcode_quality.csv,day10_barcode_cluster.csv,day10_barcode_quality.csv -o time_series 

Why am I not taking any output? Is it because they can not be combined or my there are not common barcodes? With a simple analysis, I can find common ones.

Thank you for your time and sorry for my naive question. 

with best wishes, 

Loukas