Yes. It appears the file is corrupted and I cannot open it in FPDOS. I just am not sure what this table is for in the app since I am not familiar with SBT. I could export the data from VFP (since the table can be opened in VFP 8.0) and then create a new table in FPDOS and import the data from this export, but I would like to hear from an SBT expert (or someone with some knowledge of SBT) first to possible explain what this table is used for.

>Is it possible that the dbf has been modified and is no longer usable by fp dos?
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>>Is anyone familiar with SBT running on Foxpro for DOS v 2.6? I have a client who is running SBT and has come across a problem. The consultant who implemented SBT is long gone and I just got a call. They have instructions to run a program called 'SYSFLG.PRG' to fix issues when tables get locked. When running this program, when we encounter the 'USE sysdata' line, the program returns an error 'Not a database file'.
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>>I transferred this table to my machine and I can view and open it in VFP 8.0. Does anybody know how this can be fixed.
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>>Thanks in advance for any help in this matter.