hpcc-systems/HPCC-Platform

Working with flat text file :
I sprayed a file as a csv with no delimiters and no quotes. The first 2 lines would be posted in the 1st reply.

I also passed the maxRecordSize as 2147483646 (1 less than INT.MAX) because of the large record size / line.

The ECL Record structure is :
RECORD
STRING field1;
END;

I had the following questions :

1. Def : UNKNOWN char field1
   Why UNKNOWN?
   2.XML :
   <?xml version="1.0"?>

   <Table>
   <Field ecltype="string" label="field1" name="field1" position="0" rawtype="-983036" size="-15" type="string"></Field>
   <filename>file1</filename>
   </Table>

Why is the rawtype negative?

My corresponding ECL code is as follows:

CODE: SELECT ALL
dataset_name := '~benchmark::file1';
rs := RECORD
STRING field1;
END;

histogram_dataset2 := DATASET(dataset_name, rs, THOR);

PATTERN histogramRule1 := PATTERN('(?<=_)[1]');
RULE userRatingRule1 := histogramRule1;
matchText1 := {STRING100 out3 := MATCHTEXT(userRatingRule1)};
userRatingAnswerOne := PARSE(histogram_dataset2, field1, userRatingRule1, matchText1, BEST, MANY, NOCASE);

ecl run HistogramRating.ecl --target=thor --server=master:8010

W20180502-145535 failed

<Result>
<Exception><Code>4294967295</Code><Source>eclagent</Source><Message>System error: -1: Graph graph1[1], diskread[2]: SLAVE #1 [172.31.15.1:20100]: CFileSerialStream::get read past end of stream, CFileSerialStream::get read past end of stream - handling file: /var/lib/HPCCSystems/hpcc-data/thor/benchmark/file1._1_of_2 - caused by (-1, CFileSerialStream::get read past end of stream)</Message></Exception>
</Result>

How to resolve this error?