I've seen a number of references to the "Too many columns" error, but I'm encountering something that appears to be different. Basically, I'm trying to change a single column in a table (that has 20 columns) from VARCHAR(255) to ENUM(...) where the enum list contains about 900 entries, each a string of about 50 characters or so. From what I understand the enum limit is about 65000, and the number of enum columns in a single table is about 255, but since I'm looking at values of 900 and ~5, respectively, I don't think I'm hitting these limits. Any ideas why I'm getting this error? I'm using version 4.0.13. Thanks.