I have procedure A.

This procedure calls procedure B, that I have changed with "alter
procedure".

If I try to delete procedure A, I get the message

unsuccessful metadata update
-ERASE RDB$PROCEDURE_PARAMETERS failed
-invalid request BLR at offset 714
-column FM_TIME is not defined in table B

FM_TIME is an output parameter I have deleted from procedure B
with "alter procedure".

Please note that I have duly committed the "alter procedure" command.

I have even done a shutdown of FB (v. 1.03 for Windows).

Now I am stuck, wondering how I can come out of this dilemma.

I hope that the reliability of the "alter procedure" command has been
improved with FB 1.5 .

Peppe Polpo