ACA 2016 slow opening drawing

[hjs]

Hi,

I have a drawing that takes more than 3 minutes opening in 2016.

When i open the same drawing in 2013 it takes 5 seconds.

I have tested the same drawing in 2015, 2016 and 2017. All of them takes 3 min to open the file.

What has changed between 2013 and 2015?

What does it check extra and how do i disable it?

I have done an extensive -purge, checked layer filters, reset profiles, used admin account to open, most common posts i could find in all forums.

What am i missing?

Regards,

Hendrik

[rkmcswain]

Is this (and has this always been) an ACA drawing?

If it's even been opened and saved in a non-patched version (2013-2016) of Civil 3D, then there is some data bloat present that will cause the situation you describe.

When you are talking about the various versions, are they all ACA?

[hjs]

Hi,

Thanks for the reply.

It is a series drawings we received from outside (MEP), so no most probably not. It has been created in a 2016 version of AutoCAD verticals.

But why is there such a massive time difference in opening the exact same file between 2013 and later versions?

We have 25 of these files that need to be xrefed into a project. Imagine the productivity on that project!

All software used to test the file are ACA (2013, 15, 16 and 17).

The file size is 1.8MB.

Any ideas?

Hendrik

[pendean]

Post one of these DWG files here, let's all have a look.

[hjs · Accepted solution]

Hi,

Found the problem.

They used the Angle hatch pattern as solid hatch. Deleted the hatch and the opening times is 3-5 sec in ACA 2016.

Systematically deleted batches of elements to see if i get an improvement. Then when i got there started analyzing whats was deleted. Then only deleted that in the original file and i had an uncle called Bob 🙂

This key plan is common to all the drawings received.

CAD Cowboys!

Is there a setting to override or improve this in the future?

Regards,

Hendrik

[Anonymous · Accepted solution]

HPMAXLINES to less than 5 000 000.