DXF RATNEST ???
Ken:
An "INVALID RATNEST IN DXF" error is just that, a convoluted mess of pointers
in the file. There is no "VOID" in the Autodesk DXF spec (they wrote the spec,
theirs should be adhered to by other vendors!)
MicroStation has some entities that are not in AutoCAD, one being VOIDs, which
simply do not translate. You have to go back into MicroStation and re-model
these entities.
We came across these items a while ago, and found that writing a DXF file out
of MicroStation and reading the file back in immediately generated an "Invalid
File" in MicroStation! Not real confidence-building! We stick to AutoCAD!
Greg Pyros