java-Informix-SE problem

[Ben Newman]

I've been playing around with the MetaData commands, but I keep running
into problems.  When I include the following chunk of code:

DatabaseMetaData mymetadata = con.getMetaData();
ResultSet metadata = mymetadata.getColumns(null, null, 
"custom", null);

I get this message

Error SQL: java.sql.SQLException: Column (colmin) not found in any table
in the query (or SLV is undefined). 

I can't find any info on colmin anywhere.  Any idea what I'm doing wrong?