[Nek5000-users] why I can`t change .rea with 2.1M elements to .re2

[nek5000-users at lists.mcs.anl.gov]

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 pipe.tar.gz
<https://drive.google.com/file/d/1shdsB_kjr-VXaJsu83JZ1emIB_EUZxCT/view?usp=drive_web>
​hi,manager.I have a problam that I want to make a example with 2.1M
elements but I can`t change .rea to .re2, and reatore2 will give me wrong
answer as below:
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Start converting ...

read:  **MESH DATA** 6 lines are X,Y,Z;X,Y,Z. Columns corners 1-4;5-8

 Abort: number of elements too large     2100000
 change MAXNEL and recompile
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How to solve this problem?
if I can`t change reatore2,when I run the example also have a wrong problem:
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EXIT:Problem size  requires .re2
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I have sent you my file..~!!
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