Bruce, Thanks for advice about backing -up... I do! I can go to a backed up copy of Impress presentation with all 400 links present.... close the program and reload and 25% chance all links have vanished. Go back and load backup copy.... links ok then sometimes on save/close and subsequent re- open all links gone. The risk is immediate and instant... all you need to do is save your current file. The absolute risk is standing up in front of a few important customers .. start presentation.... no sound... links vanish. I am not able to indentify as to what triggers this wipe out.... if I open each "interaction play sound" links then the path is displayed and is correct. The link however is dead. As I've said before to refresh the link you can't copy and paste as it does not restore the link. The only way to refresh the link is to re-browse the path and click OK then the link is restored. Surely there's someone in LibO team who could recognise these symptoms? I mean what activity can access the links to reset them or somehow invalidate them? I even wondered if when I defrag my drives I could somehow upset the pathways.... I'm sure someone will say it's XP's problem (which may well be true). I asked a linux wizz to run the presentation on Ubuntu and so far the links are stable. Minor problem my customers are all MS. Same problem also occurs under Win7 environment. The second problem is if you attempt to convert from impress odp to xls and them open in MS all the text and pictures are ok but the audio links non-existant. I can only think the "interaction - play sound" function in Impress is different to MS and hence the loss. BTW if we all adopted the attitude of never trying new systems and just be content with MS then as a race we deserve to die out. I still want to persevere with Impress because of it's interface.... I cannot manage the retarded GUI of current powerpoint. unimpressed Impress user -- Unsubscribe instructions: E-mail to users+help@libreoffice.org Posting guidelines + more: http://wiki.documentfoundation.org/Netiquette List archive: http://listarchives.libreoffice.org/www/users/ All messages sent to this list will be publicly archived and cannot be deleted