I get this error when trying to run the Stonefield Database Toolkit for the first time against my Mere Mortals database. The error occurs when trying to validate the USERS table. Any explanations?

SDT version:
Error #: 22
Message: Too many variables.
Line #: 77
Code: dimension taFieldList[lnTableFields, 6]
Method: GETDBFSTRUCTURE
Object: frmSDT.SDTDBCXMGR.OSDTMGR