Regex too complex error when uploading large CSV 's

[Monisha-Sohane18]

I got the Limit Error - "Regex Too Complex" when i tried to upload CSV having records more than 1000.
When i looked out for this issue , it was coming from CSV Parse Util where we are using common String functions like Split .
I resolved the issue by replacing Split with custom iterator . This will then extend the data upload limit atleast upto 5000 records .