Hello Roger, I have looked at Zipmaster code and it seems the control for maxvolumesize is within the dll - is this correct? I wanted to modify the zipmaster code myself to allow predefined disk size _without_ disk spanning. If it is practical, I will use the 'skipped files' report to build another precursor list for the next add. Thus those files will be optionally included with the next disk in line, added to the files list the user selects. RA> I cannot answer that without going the procedures and maybe do some testing RA> But as it is written today, the central directory needs to be one and RA> complete RA> So putting it on each disk will not always guarantee that you have the right RA> disk RA> in the reader, and then we end with the same problem If you hve time would you please try to extract a single file from a spanned disk set on CDROM. I am getting an error here; the extract routine just goes into an endless loop. It does not ask for disk either. Have to go out this morning but if I find it later will report back. -- Regards, Alistair+