I'm working on creating a dynamic list in a text metadata field so users can easily choose a value for the "Document Type" field.  There's 112 document types to choose from and some of the values are quite long (~115 characters).  

I registered the table, and completed the "Dynamic Field" tab in the template properties.

I applied the [Settings]MaxDropDownLength attribute on the everyone group and have tried using many different data values trying to get the dynamic list to appear when the first few letters are typed into the "Document Type" field, but the list never appears.  

I considered that the metadata field may not respond correctly to the attribute if the values being pulled from the SQL table were being truncated, so I increased the field width sufficiently, but it didn't make any difference.

For testing purposes, I created a test table in my database and used much shorter dummy values in a single column.  I registered the newly created test table and linked the values with a different template/field.  When I type into this new field, the dynamic list and the attribute seem to be working just fine.  Was this due to the shortened length of the values in the dummy table?  Could I be missing something else?

Thank you in advance for any ideas!