I am creating a problem object from a model using the appropriate apis. However, the index that I create for this object does not seem to work. Since when finding a column by its name it returns 0 although the variable by that name does exist. When using the same model and data files I use glpsol to write the problem in cplex lp format to a file. Now when in my program I get the problem object from this file, the index seems to work since the search now returns the correct number of the variable. Is there any reason why this happens or is this a bug in glpk? Thanks in advance.
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