I've added the product_modules addon, and created an attribute called wheel-size. This created a problem viewing products because the SQL generated interprets the "-" as a subtract, resulting in an error dialog box saying there's no field called "size". I've removed the product_attributes module, but the problem persists.

Is there a shortcut to removing the remnants of the module, or do I have to create a new database. I do have a lot of products, etc. defined, and would rather not reload everything.

you should use wheel_size instead of wheel-size (note the underscore), as "-" is not allowed for PostgreSQL column name.

I suggest you use a PostgreSQL adm intool (e.g. pgAdmin III) to drop the column and reload the module. You might need to restart OpenERP with option -d <your module name> to restart/reload the DB tables.

Thanks. The "-" character isn't invalid in a column name, but there are consequences as I found. I was hoping to find out a) what table is the column defined in, and b) is it referenced in any other tables that need to be cleaned up.

I did remove the module, hoping that would help. But even with it removed, the remnants remain and I can no longer view products.

I'll pass a message on to the developer of the module to do some up-front checks to prevent anyone from defining an attribute with an embedded "-".