Thanks for the quick reply.

SCHEMATABLE.TABLE does not exist, as the message says. I'm not sure where the message is generated from, as its internal to DBD::Oracle. This is, indeed, where the strangeness occurs.

I can insert things other than LOBs. I only have this problem with LOBs. Its trying to update the LOBs that I run into this strange issue. I've tried both BLOBs and CLOBs here, and found that with these two I get that error, but all other data types seem to work (anything non-lob, at least).

I have other programs (webapps) built using the same framework for web/db apps, and none of them have this issue. Some of them use the same codebase that generates this error.

The synonym is correct. Nobody, including a large team of DBAs, can fathom where this comes from.

I've used NONSCHEMA to connect to sqlplus and executed successfully a statement updating SCHEMA.TABLE.BLOBCOL with to_blob('1243').