calling fetch returns error of "Fetch() requires exactly 2 inputs (3 are given)"

What steps will reproduce the problem?
1. any call of fetch? Multiple RRAs are used.
2.
3.

What is the expected output? What do you see instead?
expected a list of values. Got an error instead. 

What version of the product are you using? On what operating system?
downloaded this 3 weeks ago, using it on Ubuntu Linux

Please provide any additional information below.

Fixed the problem by editing def prepareObject() in external.py: 

    if function == 'fetch':

        validParams = ['resolution', 'start', 'end']
        params = common.buildParameters(obj, validParams)
        return (obj.filename, [obj.cf] + params)

        # debug LJS orig follows
        #validParams = ['resolution', 'start', 'end']
        #params = common.buildParameters(obj, validParams)
        #return (obj.filename, obj.cf, params)

Original issue reported on code.google.com by Lucas.in...@gmail.com on 9 Aug 2012 at 1:05

picar / pyrrd

calling fetch returns error of "Fetch() requires exactly 2 inputs (3 are given)" #46