somebody put me into the right track.

My SQL client seems to be too old.

When using IB_SQL created with IBObjects v. 4.8.7 my SP returns -60.

I downloaded the last version of IB_SQL (which uses IBO v. 5.0.2) and the SP correctly returns 0.

I have the solution of my problem now.

This costed me several hours of work and frustration :(

Thank you

Peppe