Hi all,

i cut a section, like i have 1000 times before, and i set it up with a scale of 1/4" = 1'-0".  I have attached a .png showing what my screen looks like.  whatever I do next resets my section viewport scale to zero.  If I save and close the drawing, it will be set to zero when I open it.  if I plot it, it plots with a scale of zero.

this is somehow drawing specific, if i create a brand new drawing and draw new duct and then cut a section, everything is fine.

i have copied objects to a new drawing and produce the same results.

i fear something is corrupt in the file, but if anyone has any ideas, they would be much appreciated.

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autocad 2017, fabrication cadmep

Dell, intel xeon, 64gig ram

i have reporduced the same results on other stations with completely different specs.