Fatal error: Exit code 1 (Error in Stacks Process radtag execution)
Traceback (most recent call last):
  File "/galaxylab/production/new/shed_tools/toolshed.g2.bx.psu.edu/repos/cmonjeau/stacks/0e0ff9e9c761/stacks/STACKS_procrad.py", line 16, in <module>
    from stacks import *
  File "/galaxylab/production/new/shed_tools/toolshed.g2.bx.psu.edu/repos/cmonjeau/stacks/0e0ff9e9c761/stacks/stacks.py", line 19, in <module>
    from galaxy.datatypes.checkers import *
ImportError: No module named checkers