=?ISO-8859-2?Q?Dud=E1s_J=F3zsef?= <dj1999(at)freemail(dot)hu> writes:
> I know that something doing wrong, but I can't find out what is it.
Getting a stack trace from the point of the errfinish call would
probably help narrow it down. One thing that's not clear is whether
SPI_modifytuple itself is failing (have you checked all the *other*
arguments you're passing it?) or whether it happens later.
regards, tom lane