What is the maximum file size handled by Calc?

I am trying to import a csv file into Calc. But Calc seems to freeze and does not respond within several minutes. So eventually I have to kill the process. I have tried files from around 60MB down to around 10MB without success.

1024 columns x 1048576 rows

I was merely referring to the file size, not the sheet size. The file contains a sheet not exceeding the maximum number of rows and columns.

Please what Operating System and LibreOffice version?, as csv are imported or opened in sheet that should be the limit, the only reason I can think on the problem is data that can’t be imported properly or too much large data for a single cell.

Patience is a virtue!
I just had to wait much longer than I had anticipated - it takes several minutes for Calc to chew through the file and load it, but eventually it works.

Sorry for the bother