Newbie question: sqlca.sqlcode positive or negative?

Good afternoon,
we have a database based application, launching SQL queries on an Oracle 8.1.7 database.
These queries return sqlca.sqlcode values, like 0 in case of succesful and 1403/-1403 in case of unsuccesful.
Exactly the latter is a problem: the whole application is based on the following condition:
sqlca.sqlcode = 0 => OK
sqlca.sqlcode < 0 => NOK
This works fine on our test lab, where the return values are always negative (-1403) in case of a "not found", but it seems that at client's side, sometimes a positive value (1403) pops up, resulting in a bad behaviour.
My question: is it possible to configure Oracle in such a way that the return codes are always negative (in order for us not to change the whole application)?
Thanks
Dominique

Thanks for the fast reply.
The mentioned solution however doesn't work:
1. The problem is not that I always have a positive value, but sometimes a positive and sometimes a negative one, so multiplying with -1 would just turn bad results into good ones and vice versa.
2. Moreover in order to change the value of the code, I would need to change the application, and I am looking for a way in which I don't need to do so. I am looking for an Oracle parameter that prevents differents signatures for the same SQL return codes.
Kind regards
Dominique

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