During decomposing the individual processors cannot find the constant directory. fileOperation::findInstance does not see the 'constant' directory (value is 0) as coming before the -180 :

    for (instanceI = ts.size()-1; instanceI >= 0; --instanceI)
    {
        if (ts[instanceI].value() <= startValue)
        {
            break;
        }
    }

Workaround: start off with a 'normal' time directory and rename later on.