This sounds a bit like a problem we encountered when using a Novell network. Aparently Novell has some sort of caching option, which if switched on can result in corruption and loss of data from the MI .map file.
----- Original Message ----- From: "Bean, Nick (N)" <[EMAIL PROTECTED]> To: "'MI-L'" <[EMAIL PROTECTED]> Sent: Tuesday, December 17, 2002 3:04 PM Subject: MI-L disapearing map objects > Dear Listers, > This is a problem which has been occuring in one of our regional offices. > And I am somewhat confused by it. It's almost as if the network is loosing > the files between edits. The Mapinfo tables are being created in house. > > It appears that a file has become corrupted, and the polygon extent (similar > in size to the superseded table) is no longer in the Map (the map still > exists, but does not appear to have anything in it). The file size of the > *.Map file (1kB) indicates that the object no longer exists in this file. > There are however objects (4No.) in the associated Browser Table. > > This problem has occured several times on different files related (mostly) > to this project (typically layers with a small number of polygon objects in > it). In this particular case, initially, the polygon was visible in the Map > Window, but not selectable using the pointer (select & edit ticked in layer > control). It was possible to select the polygon using Query>Select all from > layer..., however once selected we were unable to perform any operations on > it (eg. Object>Set Target...). Upon closing down MapInfo, and re-starting > the computer (universal first solution to all computer problems!), the layer > was fine. After modifying the layer further, it 'corrupted' again, this > time removing the objects from the Map file. > > The PC's MapInfo is runnig from are Pentium 4's with 250 / 500MB RAM, > however we have (at times) a particularly slow network connection up here, > making MapInfo quite sluggish. > > We have a recent backup of the corupted file, so this is not a big problem > in itself, but the fact that this has occured several times now over the > past 4 months is of major concern. I would appreciate it if you could > have a look at the files and let me .know if you have any suggestions. > > Regards, > > Nick Bean > GIS Manager > Information Solutions Group > Binnie Black & Veatch > e-mail: [EMAIL PROTECTED] > Direct Line: + 44 (0) 1737 856 402 > Fax: +44 (0) 1737 772 767 > > This message has been sent via the Internet. Binnie Black & Veatch Ltd > therefore can not guarantee that this message has not been modified in > transit. This message on its own should not be viewed as contractually > binding. This message and any files transmitted with it are confidential > and intended solely for the use of the addressee. If you have received this > message in error please notify the sender and destroy your copies of the > message and any attached files. > > > > --------------------------------------------------------------------- > List hosting provided by Directions Magazine | www.directionsmag.com | > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > Message number: 4577 > --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 4587
