>>>>> "Michel" == Michel Pelletier <pelletier.michel@xxxxxxxxx> writes: Michel> Replying to my own problem here, I guess this was a situation Michel> where explaining it in detail revealed the problem to me. By Michel> specifying my type is 'passedbyvalue' That cannot possibly be appropriate. Michel> CREATE TYPE matrix ( Michel> internallength = 8, Your type is clearly not a fixed-length type, because fixed-length types cannot have expanded datums. A fixed-length type must contain its entire representation within the fixed length - it is not allowed to be a pointer to something else. -- Andrew (irc:RhodiumToad)