Erroneous means containing errors. I wanted to say about files that generate errors in a computer program, so I posted on a public mailing list: errogenous files. Could it be better? By better I don't mean more amusing.
Maybe the construct I used is correct, but unfortunate. Is it? Actually you won't find any "errogenous files" on the net except those of mine :)
The program scans files, and the files in question contain characters which trigger error messages in the scanning program.