Thanks Cattaneo fro bringing this one up
I have found that Mapinfo has a very poor backwards support for file
formats. We started originally with v4 16 bit and for most but not all
users have moved up each version thru maintenance to 5.5. When we switched
to 4.5 we expected problems in backwards compatibility due to the node and
line type changes, due to mbx needs and old copies of 4.1 floating about we
kept a 16 bit version of 4.1 running to maintain compaltibility of our
corporate map data and most data is maintained to match older line styles,
the 32.000 node plines and polys are only rarely encountered.
We have found the saving of files which should not constitute a problem to
older version a total mess. All the old 4.1 and even mac versions report
table x.tab cannot be opened but version 4.5 can. A simple number change in
a text editor fixes the tab file , older versions in nearly all situations
then open file. This process apart from time consuming is an alien concept
to most of our users who are trying to send maps to collegues with older
versions. I don't expect that MI go as far as MS in the way it produces
file opening plugins for older versions but Why oh why can Mapinfo not
implement a 'save a V4.0' option in the file>save table/workspace menu for
workspaces and tables like it does for v2 thereby reducing organisations
with multiple platforms / version this hassle. Could this one be added to
the wish list ???
thanks for listening
Adrian
>>Therefore we open that workspace in a text editor, so that we can change the
>heather-line:
>
>* !version 450 instead of 550
>* !charset WindowsLatin1
>
>As a result all the saved tables which appeared correctly on the screen in
>MI 5.5 are gone in MI 4.5.
>
>Did everyone else experienced the same kind of trouble using two different
>versions of MapInfo?
>Or which functions changed in MI 5.5 that cause those troubles?
>
>By the way I've read the mails of Mats Elfstrom and Steve Wallace concerning
>that the buffer does not work correctly in MI 5.5 as a windows solution.
>
>Yesterday we used the buffer tool and were surprised that in the windows
>version the buffers look like eggs. So that we took that table to the good
>old Mac and were very much surprised that MI 4.0 for Mac shows the buffers
>correctly as circles.
>
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