Over 1 million rows, that cant be as all together there only just over 2k contracts in the database.
The file contains more than 1,048,576 rows or 16,384 columns. To fix this problem, open the source file in a text editor such as Microsoft Office Word. Save the source file as several smaller files that conform to this row and column limit, and then open the smaller files in Microsoft Office Excel. If the source data cannot be opened in a text editor, try importing the data into Microsoft Office Access, and then exporting subsets of the data from Access to Excel.
The area that you are trying to paste the tab-delineated data into is too small. To fix this problem, select an area in the worksheet large enough to accommodate every delimited item.