# 3490 Altering a Table with Computed Columns Can Cause Invalid Floating Point Operation

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I have a table which has a boolean column that I want to DROP.

I use the command (both via the EDB Dialog and also in an editor) below and get the message "Invalid floating point operation".

I have created a copy of the table, and if I do it without data, I can DROP the column. If I create the table with data, I get the "Invalid floating point operation".

I have checked the other columns and none of them reference the column I want to drop. The original table had triggers on update, but none of those referenced the column, and the table copied didn't have the triggers.