>I suspect some form of bug because I have use IBO for some time, and quite
>extensively, without problems.

Well, maybe, but then it has to be particular to that subrelease of IBO.
What you are doing is so simple and common that such a bug would be very
short-lived. Besides, yesterday I tried the same type of query with IB_SQL
without problems, and that program is based on IBO (using TIB_Cursor, I
believe).

Can you do simply 'SELECT PCOST FROM ...' in your program? If that doesn't
work, there is something more fundamentally wrong - e.g. attaching to the
wrong database or using the wrong table.

HTH,
Set