Earlier versions of filePro under HP-UX stored the data on disk in a format that is not compatible with other versions of filePro. There were some additional padding bytes in the binary headers, due to the different CPU architecture. The HP version of filePro has been changed to use a format that is compatible with the other systems that filePro runs on. If you have data from the earlier version of filePro, you need to "unpad" the data to remove the extraneous padding bytes to convert to the compatible format.