In need of opinions: converting from cadcore to AutoCAD

I apologize if this double post. But, I've waiting 2 hours and never
seen it appear.
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We are currently converting from an very old cad program - Hitachi's
Cadcore to AutoCAD 2000i.
The consultant leading this project want us to scan the drawings from
cadcore and then insert the raster image into AutoCAD then trace over
that raster image - in other words Redraw everything.
We have hundred's of maps with at lease 10 years worth of information
on them.

His "latest" reasoning for converting this way: "is because bringing
these files over from Cadcore also brings corrupt data along with it".

I have been able to easily DXF out of cadcore and insert that DXF file
into AutoCAD, the converted data does need to modified to match what
it use to looked like - but it still takes half the amount of time
then a "redraw" takes.
I ran audits on these DXF files and converted about 5 maps into
AutoCAD and I have yet to encounter ANYTHING that seems to be corrupt
data.

My question is this: is what our consultant claims to be true and
possibly some time down the road, the maps I've converted will be
useless - because of this "corrupt data"
OR
transferring from Cadcore to AutoCAD should be OK, as long as we
understand that some of files may not DXF-Out due to true corruptions.

I'm not a Cad expert by any means - so please keep the replies
somewhat simple, if possible.

Thanks in advance.

 

As DXF is pretty much a standard file transfer protocol I would have
have thought that if you can create DXF files from CADcore and import
them into AutoCAD the only problem you might have have is the loss of
some layer formatting I.e. in the layers dialogue box all the layer
colours will have defaulted to black/white and the linetype to
continuous. Another downside I have come across with DXF files is the
tendency to 'explode' polylines into individual entities which can be a
pain.
Once you have modified your drawings in AutoCAD and saved them in .dwg
format, they should DXF-out with no problem.

Jim