Hi, Working with MonetDB I encountered a problem with queries containing utf-8 characters. Some queries errored. I traced the error back to mapi.py module for python3. The problem was that encode() was applied after splicing the packet. With encode, any utf-8 characters are expanded to multiple octets. For a given block that exceeded MAX_PACKAGE_LENGTH this resulted in the last few octets falling off a package. The patch below remedies this, please apply. Regards, Bas Bloemsaat --- /srv/src/monetdb/MonetDB-11.23.13/clients/python3/monetdb/mapi.py 2016-10-07 11:00:50.000000000 +0200 +++ /home/bas/.pyenv/versions/ent_venv1/lib/python3.5/site-packages/monetdb/mapi.py 2016-12-23 12:02:53.431357999 +0100 @@ -275,8 +275,9 @@ class Connection(object): def _putblock_inet(self, block): pos = 0 last = 0 + block = block.encode() while not last: - data = block[pos:pos + MAX_PACKAGE_LENGTH].encode() + data = block[pos:pos + MAX_PACKAGE_LENGTH] length = len(data) if length < MAX_PACKAGE_LENGTH: last = 1