We fixed the AC3 error in our latest update. However, since you still have the issue, it may be related to the file it self.
Would you be able to send us a sample file?
To send us a file up to 1 GB in size, please follow these instructions:
1. Go to https://tobor2.prognet.com/cgi-bin/incoming.cgi
2. You will see instructions for attaching the file. Choose the file you want to send us.
3. In the "to" section, enter "gsharma".
4. In the box below, enter your email address and/or ticket number, along with a brief note about the issue (just a sentence is fine).
5. Click Send.
We will review the file(s). If for some reason we have difficulty receiving the file, we will let you know.