Exporttoautocad

[gogerTR72K]

hello everybody,

my file won't accept the command exporttoautocad. It takes like 1 hour until it is done but there is no file. the only files that occur are .mms files that are named like Aec6D88_13.mms.  In the command list an error ocurrs: FEHLER: Löschen fehlgeschlagen (eVetoed)Das Löschen einer mittleren Haltung in einem Kanalsystem ist nicht zulässig.

Please help me. It works totally fine with other files. 
Thank you!

[AllenJessup]

For c3d drawings use EXPORTC3DDRAWING

[brian.strandberg · Accepted solution]

I find if EXPORTC3DDRAWING isn't working well or taking a long time there is corruption in the drawing / references.  I would use AUDIT / PURGE to clean the drawing and try again.

That being said, once in a blue moon I find a drawing that has issues that I have cleaned relentlessly.  In that case (and I definitely try cleaning the file first), I use this procedure.

1. Bind or Insert All References.
2. At the command prompt type in AeccPromoteAllReferences. This will promote all data references into the current drawing.
3. At the command prompt type in AecOBJExplode. This will explode all Civil 3d objects into AutoCAD objects.
4. Purge all Civil 3d Styles. Now that the Civil 3d objects have been removed, this will help free up space.
5. Use the SAVEAS command to save the drawing to a new file name. At this point if necessary, you can select an older file format version. Do not use SAVE, which will update the current drawing with all the references promoted.

[gogerTR72K]

this worked. I only used the AUDIT and PURGE and AECOBJEXPLODE commands. After that, the command exporttoautocad worked perfectly! 
Thank you!