The guy whose company built the app that tanked the Iowa caucuses wants you to know he feels really, really bad about the whole ordeal.

Shadow Inc. CEO Gerard Niemira told Bloomberg Tuesday the company had scrutinized its caucus app, a purpose-built piece of software intended to speed up the reporting process, and found a bug that ended up having the opposite effect.

The bug wasnt in the app itself (though he conceded theres room for improvement there), but in the code that relayed data tabulated by the app from a caucus chairs phone to the state party.

The app was sound and good, Niemira said. All the data that was produced by calculations performed by the app was correct. It did the job it was supposed to do, which is help precinct chairs in the field do the math correctly. The problem was caused by a bug in the code that transmits results data into the state partys data warehouse.

Iowa Democratic Party Chair Troy Price confirmed that diagnosis in a separate statement . Price also emphasized the underlying data recorded and reported by caucus chairs was independently verified as valid and accurate thanks to backup paper documentation.