sara.py line 219, undefined pd_tolf

[y-mhiri]

if ntol < niters:
    pd_tolf = pd_tol[-1]
    pd_tol += [pd_tolf]*niters  # no harm in too many

When niters is equal to 1, for all ntol we have ntol >=niters. It results in pd_tolf not being defined raising an error later in the worker. A simple fix would be either changing the condition to ntol <=niters or setting pd_tolf before the condition.

pd_tolf = pd_tol[-1]
if ntol < niters:
    pd_tol += [pd_tolf]*niters  # no harm in too many

[landmanbester]

Good catch, thanks for reporting. I will add a fix for this to #117