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AutoCAD 2020 can't read DXF files from Geomagic Freeform
DXF files creating in Geomagic Freeform will not open in AutoCAD 2020. These same files open in every other application that accepts DXF files without an issue. AutoCAD does not display an error when attempting to open the file, I simply see the "Press Enter to continue" prompt before being direct back to the Start dialog. I have tried Audit and Repair on the files, but nothing happens.
I have attached two very simple files, the one labelled 2015 opens in all versions of AutoCAD until 2020, whereas the 2019 file is not accepted by any of the recent versions of AutoCAD.
Any help with how to diagnose this issue would be greatly appreciated. Thanks!
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Thats because of
1. the DXF file data is corrupt, doesn't match the official definition
2. All other software you talk about are using a defect or not well working DXF interfaces,
they ignores error (data that not follows the definition of DXF Format)
Your sample file 2015: File format ac1500? LOL, AC1032 is currently the highest DXf Format (DXF2018),
so normaly NO software in the world should open this file because no software on earth knows the DXF Format of the Year 2699.
And that's not the only error in this file. Looks like a student work result <sorry>
and so on..
Sebastian
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When I try to open either of the dxf files, I get the message
Error in APPID
tableDXF read error on line 296.
This is because the files do not have an APPID table which is required for that format of DXF file.
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@artc2 wrote:
The "AC1500" is a valid format value. It was used during development of AutoCAD 2000. The format value was changed to AC1015 before AutoCAD 2000 was released.Thank you for this information, so I change my statement: It wasn't an official DXF version.
(Same with AC1001,1005,1007,1008,1010,1011,1013,1500,402a, What is about 1800 and 1800a, also DEV fileversions?)
(important for DXF-Structure is the fact, it is a format newer than dxf12)
May i ask: AC1800 and AC1800a was also a development fileversion(from which program versions?), but never used in public versions?
When I try to open either of the dxf files, I get the message
Error in APPID
tableDXF read error on line 296.
This is because the files do not have an APPID table which is required for that format of DXF file.Yes, I(!) know that, but as I wrote it isn't the only one problem.
Sebastian
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The corresponding string version values are:
kDHL_1800a "AC402a"
kDHL_1800 "AC402b" (late AutoCAD 2004 development)
kDHL_1800 "AC1018" (final shipping AutoCAD 2004)
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Thanks for all of the feedback so far. It's clear that we have some work to do in terms of updating the DXF writer.
Is it possible for us see where the errors/failures occur? Like I mentioned in the initial post, AutoCAD just refuses to open the file, but I have never seen an error or any feedback inside the application related to what is wrong.
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Try to open the file in a RealDWG/AutoDesk software like AutoCAD
you can see where the program stumbled over the first problem (see the feedback in Commandline/ Textscreen [F2]).
But from this point on you need the knowledge what is wrong an what is right, what is missing.
For this you need the knowledge about the used DXF Format, The information from Acad Open command is just a hint.
A) I think AC1500 should not use, but i would ask @artc2
AC1015 is the normal format-code for DXF2000 Format.
B) The first error is at Line 296
Acad is missing an APPID table
This table is not optional (all software which loads this file ignores the missing appid section)
Perfect sample for "is just a hint"
1. There are more problems in the part Line1-295, but these problems appears later.
2. Line296 is the point where the ENDSEC(Table) is, at this point ACAD know - there is no Appid.
Acad would add the Appid table not in Line 269, Acad adds the appid table between UCS & DIMSTYLE Table.
I stop here - good luck
Sebastian
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As Sebastian suggests, Ac105 should be used as the format value for that version of DXF.