MI-L Importing XL into MI V7.0

[Richard Hill]

Hello everyone, 
Is there any limit on the size of an XL spreadsheet that can be opened
in MI V7.0?
I tried opening about 33000 lines of assay and geology data and only the
first 32500 or so came up in the browser window, the rest come up very
slowly as zeros as I scroll down.
Would it be better to import them from a csv or txt file?
 
Cheers, 
Richard Hill
Southern Titanium NL