Error with using --user-prediction in item_recommendation

[sharathchandra92]

Hi,

I have a 300x100000 user-item matrix (sparse). I am trying to get user predictions on this. I get the following error:
$ item_recommendation --training-file=user_item_sparse.csv --compute-fit --measures=AUC --cross-validation=5 --recommender=BPRMF --user-prediction
loading_time 0.58
memory 13
training data: 94497 users, 296 items, 282453 events, sparsity 98.9902
BPRMF num_factors=10 bias_reg=0 reg_u=0.0025 reg_i=0.0025 reg_j=0.00025 num_iter=30 learn_rate=0.05 uniform_user_sampling=True with_replacement=False update_j=True

---

* An uncaught exception occured. Please send a bug report to [email protected],*
*** or report the problem in our issue tracker: https://github.com/zenogantner/MyMediaLite/issues ***
*** MyMediaLite 3.10 ***

---

Argument is out of range.
Parameter name: index at System.Collections.Generic.List1[System.Collections.Generic.IList1[System.Int32]].get_Item (Int32 index) [0x00000] in :0
at MyMediaLite.Data.DataSet.BuildItemIndices () [0x00039] in /home/sharath/Desktop/MyMediaLite-master/src/MyMediaLite/Data/DataSet.cs:190
at MyMediaLite.Data.DataSet.get_ByItem () [0x0000b] in /home/sharath/Desktop/MyMediaLite-master/src/MyMediaLite/Data/DataSet.cs:92
at MyMediaLite.Data.PosOnlyFeedbackCrossValidationSplit1[MyMediaLite.Data.PosOnlyFeedback1[MyMediaLite.DataType.SparseBooleanMatrix]]..ctor (IPosOnlyFeedback feedback, UInt32 num_folds) [0x000d2] in /home/sharath/Desktop/MyMediaLite-master/src/MyMediaLite/Data/PosOnlyFeedbackCrossValidationSplit.cs:61
at MyMediaLite.Eval.ItemsCrossValidation.DoCrossValidation (IRecommender recommender, UInt32 num_folds, IList1 test_users, IList1 candidate_items, CandidateItems candidate_item_mode, Boolean compute_fit, Boolean show_results) [0x00016] in /home/sharath/Desktop/MyMediaLite-master/src/MyMediaLite/Eval/ItemsCrossValidation.cs:51
at ItemRecommendation.Run (System.String[] args) [0x0045a] in /home/sharath/Desktop/MyMediaLite-master/src/Programs/ItemRecommendation/ItemRecommendation.cs:297
at ItemRecommendation.Main (System.String[] args) [0x00006] in /home/sharath/Desktop/MyMediaLite-master/src/Programs/ItemRecommendation/ItemRecommendation.cs:157
Terminate on unhandled exception.

Could you please help me resolve it? Thanks :)

[zenogantner]

Is this still an issue?