offset += retCode;
count -= retCode;
unpPackedSize -= retCode;
archive.bytesReadRead(retCode);
if (unpPackedSize == 0 && subHead.isSplitAfter()) {
Volume nextVolume = archive.getVolumeManager().nextArchive(
archive, archive.getVolume());
if (nextVolume == null) {
nextVolumeMissing = true;
return -1;
}