This behavior can occur if the Excel spreadsheet contains more columns than the dBase format in which it is saved can support.
The dBase IV format can contain a maximum of 255 fields (columns) per record, dBase III can contain a maximum of 128 fields per record, and dBase II can contain a maximum of 32 fields per record.
The number of columns that are saved depends on the version of dBASE in which the file is saved. Excel 2000 can contain up to 256 columns of data.
The following table shows how many columns of data are saved when the
database is saved in various .dbf file formats:
File Type Number of Columns
---------------------------------
dBase II 32
dBase III 128
dBase IV 255