Existing table can not be found

Hi all, IDS 7.31.UD1X4, I know, very old version. Somebody created a tables in an informix database by using the export function of MS Access via Sequelink ODBC (didn't even know, that it was possible). With MS Access the table can be accessed, the content can be read. With dbaccess you see the table in the Table-Info menu, you can also see the columns. If you choose Status an error message appears: 206: The specified table (owner.ba_wco_ea) is not in the database. 111: ISAM error: no record found. I tried to drop the table, no success, same error as above. I checked syscatolog, no errors. I also had a look to sysmaster:systabnames. The table is present. What's wrong? I would be happy if at least I could drop the tables. Uups: Last minute finding: The table name is "BA_wco_ea" but in the error message the are no capitals. Could that be the reason? TIA. Reinhard.