TRIM

It should not matter, but I did COPYBASE and PASTEBLOCK, SCALED, EXPLODED the polylines that are giving me grief.

What I remember about AutoCad trimming with closed polylines is that it always trimmed off the part I wanted to keep. I also remember trimming lines at curves and it didn't appear to have trimmed up to the curve. A regen usually showed it was actually there.

I have the big brother of REGEN at the tips of my fingers: REA or REGENALL.

When I did not COPYBASE, PASTEBLOCK, SCALE and EXPLODE it worked fine.
The drawing still had the issue in CAD2006.

Never had the problem before. AUDIT came up with zip (which is odd as C3D seems to have an exception or unhandled key just about every time I AUDIT). Perhaps a WBLOCK will shake loose the issue.

Fun afternoon...

Try increasing the value of your VIEWRES setting.

You can only trim a polyline with another polyline if they are both the same elevation.

Yup, 2d polyline? change elevations to 0

Both zero. It's a routine I've done hundreds of times. I am creating a locus map from the assessors' GIS. COPYBASE a large enough area, PASTEBLOCK into a rectangle copied from the surrounds, SCALE 1/2000, EXPLODE, ERASE the free danglers, TRIM the hanging danglers, PAN around to see what was missed, put the remainder into the right spot in the surrounds.

One polyline has a bunch of segments. I select the trim line and it takes out the whole segment as if I had selected the segmented polyline as the trim line.

I discovered the EXTRIM function in all this (AWESOME!) but that fails as well.

> Tried playing with EDGEMODE, TRIMMODE, the Extend/No Extend option under trim.
> About to open the file in CAD 2006 where it works right. Any guesses? C3D 2014.

No guesses, but I can verify that I occasionally run into a pline that won't trim without monkeying with it somehow (e.g. EXPLODE). It seems to me that this started happening with AutoCAD 2010 or so, and it persists with AutoCAD 2013. It doesn't happen often, but it does happen. I just shrug my shoulders and work around it.

Same here. A few versions ago, the TRIM command started to act up. I'm currently running 2014, and it usually works, but sometimes polylines won't completely trim - there will be a short stub left beyond the trim line. Issuing the TRIM command again and picking the stub will trim it correctly.

With each new version, Autodesk adds neat new features, and breaks a bunch of old ones.

I'm not sure about C3D but, the extend line command, used in conjunction with the trim command, can be helpful in some situations.

The problem file causes the same issue in MAP 2006 so there must be some corruption.

I guess I will reconstruct my assessors' drawing in 2014 to see if it's a version problem.

Thanks for all the help everyone.

I just draw it a little long, click on the grip, and drag it to an intersection.

:good:
default setting is something like 100 and the range is 1-20000. I have mine set at 10000.

I do recall a few times when the trim command would give me an error and even crash the system. Maybe a purge or audit is in order.