WorkflowError in line 15 of Snakefile: Extensions for multiext may not contain path delimiters (/,\) and must start with '.' (e.g. .txt).

[FinishFYP]

I encounter the problem when I entered "snakemake -jall" on the terminal command line, which is as following:

aileen@aileen-HP-ZBook-Studio-15-6-Inch-G8-Mobile-Workstation-PC:~/Project_ZYT/serpentine-env-master$ snakemake -jall
WorkflowError in line 15 of /home/aileen/Project_ZYT/serpentine-env-master/Snakefile:
Extensions for multiext may not contain path delimiters (/,\) and must start with '.' (e.g. .txt).
  File "/home/aileen/Project_ZYT/serpentine-env-master/Snakefile", line 15, in <module>

But when I changed "/" to "_", it still didn't work out.