mmm, I guess that was not the problem. The text file that I am prcessing is very larg, it has over 8 million lines and the utterance that scripts aborts at(without any error message)is at line 43,100. The only unusual thing that I noticed first near the last utterance processed was that the column in front of p ($p_value) was empty. The last utterance was "History of present illness:" my nlp software (MMTX) prases it into three phrases : "History","of present illness" and "" which is actaully the punctuation":" First I thought ":" is the problem but apparently it is not since there are multiple instances before this one from the very first lines.
Do you think this is a size/buffer issue?