nan predictions

[eloiup]

using the python wrapper (libffm-python)

for some reason, when the input dataset becomes too large (too many "fields" ~ about 29 or more), the predictions (at least the first iterations, havent checked if it changes eventually after N iterations) are all NaN

*edit: few samples of data, even a one row dataframe, presents the same issue, so it appears to be "fields" related

*edit2: tested, doesnt cnverge after N iterations