When TBC works with files, it loads them into memory in order to display them. 
You will not have enough RAM on a laptop or a desktop to load a file of this 
size. The resulting RDF graph will have 81M triples. You need to convert it 
using some process that does not involve TBC UI. 

Further, if you have a file of this size, you will not able to open in with TBC 
as a file - you will run out of memory. You would need to first stream ii into 
a TDB. To do so, use Import->TopBraid Composer->Import RDF files into a new 
TDB. This will stream the file into a TDB. Once TDB is created, you should be 
able to open it with TBC.

> On Feb 2, 2018, at 7:45 AM, Sina <sinamad...@gmail.com> wrote:
> 
> Eight columns & thanks for looking into this
> 
> On Friday, February 2, 2018 at 1:55:43 AM UTC-5, Irene Polikoff wrote:
> How many columns?
> 
> Sent from my iPhone
> 
> On Feb 1, 2018, at 3:35 PM, Sina <sinam...@gmail.com <javascript:>> wrote:
> 
>> Hi, 
>> 
>> Do you have a recommended setting/memory/etc. for importing an 800Mb tab 
>> delimited text file (9 million rows) into an ontology through the TB import 
>> spreadsheet function? 
>> 
>> Thanks! 
>> 
>> Sina
>> 
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