Provide a helpful error message when someone tries to run test01 from hand.
Provide a helpful error message when someone tries to run test01 from hand.

gusevfe/snakemake,gusevfe/snakemake,gusevfe/snakemake,gusevfe/snakemake,pascal-git/snakemake,pascal-git/snakemake,pascal-git/snakemake,pascal-git/snakemake