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It appears that a file has become corrupted, and the polygon extent (similar in size to the superseded table) is no longer in the Map (the map still exists, but does not appear to have anything in it).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
