Strange Informix error

I have an ORACLE background but for the last year I've working at a site that also has Informix - so I am self-taught but the teacher doesn't know much ;-) I'm using On-Line 7.31.UC6. In dbaccess, I go into INFO and choose my table. When I select Columns this is what I get: Column name Type Nulls msisdn varchar(16,0) yes rec_type char(2) yes upd_year_month datetime year to month yes rec_count integer yes ... < 7 integer columns here> charge_unit integer yes air_charge integer yes surcharges integer yes When I go into Status, this is what I get: 217: Column (surcharges) not found in any table in the query (or SLV is undefined). Presumably Status calls a view(?) which can't find the column, but how does Columns think it's there in the first place? Also, select count(*) from <table>; gives the same error. I'm thinking that the Data Dictionary has an error. How could this happen, and how do I fix it? I tried finderr 217 but it focuses on errors in my SQL statements. Any help would be appreciated. Thanks, Chris Bullivant