Simple C++ program using libpq that failes very quickly using the lo interface

For me, using the postgres snap, I got yesterday from (march 11)
ftp.postgresql.org,
the following test program cut from test/examples/lotest.c
failes on the 16th file.

The dummy files are named after their size/512 bytes.
The log file message I get is, included in the tar file.

Note: I don't seem to have any problems if I use lo_import and lo_export
The problem of course is that I don't want my data to have to go through tmp files
on it's way in or out of postgres.

the program only requires libpq and the postgres include directory.
Usage:
lotest [-u dbuser (null)] [-p password(null)] [-P port (null)] [-d dbname(prod)] [-h host(null)] dummy/*
I use it
createdb tmp
lotest -u jason -d tmp dummy/*
lotest -u jason -d tmp dummy/*
can't create large objectimport of dummy/01 failed
can't create large objectimport of dummy/02 failed
imported dummy/03 to 88837
imported dummy/04 to 88852
imported dummy/05 to 88867
imported dummy/06 to 88883
imported dummy/07 to 88899
imported dummy/08 to 88915
imported dummy/09 to 88931
imported dummy/10 to 88948
imported dummy/11 to 88965
imported dummy/12 to 88982
imported dummy/13 to 89000
imported dummy/14 to 89018
imported dummy/15 to 89036
error while writing lo for "dummy/16", got back -1, wanted 2048 : No such file or directory
import of dummy/16 failed
can't create large objectimport of dummy/17 failed
can't create large objectimport of dummy/18 failed
can't create large objectimport of dummy/19 failed
can't create large objectimport of dummy/20 failed
END command failed



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end