Unable to upload a flat file (csv) by using Flat file import

Hi All, I am using flat file import to upload csv file to mendix App. I am able to upload the file(less file size) But when I am uploading a file size of 129MB (Maximum file size in Mendix to 500 MB) , I unable to upload the file. Can anyone suggest me what would be root cause of this? And what would be better idea to get the csv file mendix having file size of 150MB approx.
1 answers

Are you sure the limit on file size is not being imposed by the web server you are using? Both Apache and IIS have limits on file size by default