Tag Archives: PDF

Huge PDFs? AutoCAD 2017.1.1 could be to blame

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Autodesk has yet again demonstrated why continuous automatic updating is no panacea for avoiding CAD update disruption. On the contrary…

If you have noticed some of your PDFs exported from AutoCAD getting huge and unwieldy lately, AutoCAD 2017.1.1 could be to blame. Try uninstalling it using Programs and Features > View Installed Updates and see if the problem goes away. It may also be possible to work around this by going into PDF options and turning on Include Hyperlinks. Source: The Swamp.

Here’s one possible* install history:

  • You install AutoCAD 2017. This defaults to also installing Autodesk desktop app. If this works on your system and you leave it on there doing its thing and consuming your resources, it will attempt to automatically keep your Autodesk software up to date.
  • Autodesk desktop app installed AutoCAD 2017.1. You like this because it has added a couple of nice features. In apparently unrelated news, you seem to be getting more fatal errors and several of your add-ins have stopped working. You decide to do without them.
  • Autodesk desktop app installed AutoCAD 2017.1.1. Your add-ins have magically started working again and there seem to be fewer fatal errors.
  • You get some huge PDFs from AutoCAD but read this post and uninstall AutoCAD 2017.1.1. The PDFs you create are no longer huge, but your add-ins have stopped working again and there seem to be more fatal errors.
  • You read this other post and manually install the AutoCAD 2017.1 Hotfix. Your add-ins start working again. The fatal errors remain.
  • Autodesk desktop app continually and perpetually nags you to install AutoCAD 2017.1.1.**
  • You uninstall Autodesk desktop app. Your system speeds up and the nags go away.

Moral of the story? Autodesk isn’t competent enough to trust with automatic updates. Uninstall Autodesk desktop app. Relax.

* YMMV
** I don’t know if this actually happens (Autodesk desktop app is not going to be installed on any of my systems to find out) but it wouldn’t surprise me.

AutoCAD’s magic vanishing attachments

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There are now quite a few file types that you can attach to an AutoCAD drawing as a reference, in the same way that you can attach other drawings as xrefs. We’ve been able to attach other drawings since Release 11 (1990) and images since Release 14 (1997), but every release since 2007 has introduced a new kind of attachment. In AutoCAD 2010, you can now also attach PDFs, MicroStation DGNs (v7 and v8), DWF and DWFx files.

But should you? Maybe not. It depends who is going to use those drawings after you. If you know for certain that every user of that drawing is going to be using 2010 and later, that’s no problem. But if there is the possibility of earlier releases being used, your fine-looking attachments could vanish silently in the night. Attach a PDF to your drawing in 2010, give it to a user of last year’s AutoCAD 2009 (you’ll need to save it as a 2007 DWG) and what will he see? Nothing. There is no text-screen warning, no bounding box, no piece of text indicating the file name, nothing. Just a blank space where there should be useful drawing content.

This problem isn’t new to 2010, because there are similar problems with the other recent attachment types. Let’s examine them one by one:

  • PDF – visible only in 2010 and later (except for the special case of 2009 with the Subscription-only Bonus Pack 2).
  • DWFx – visible only in 2009 and later.
  • DGN v7 – visible only in 2009 and later.
  • DGN v8 – visible only in 2008 and later.
  • DWF – visible only in 2007 and later.

It’s important to note that the attachments don’t actually disappear from the drawing. They are still stored there, even if you save to an earlier DWG format like 2000 or 2004. The attachments survive the round trip to an earlier DWG format intact; they will reappear just fine if reopened in 2010. (Round-tripping of new object types is something that Autodesk has done extremely well over the years).

In most cases, the objects are stored invisibly as proxy objects (object name ACAD_PROXY_ENTITY, known in the early days as zombies). In some cases, they are listed as special Underlay objects (e.g. DGNUnderlay, DWFUnderlay). In 2000 to 2006, they all list as proxies. How can you list these objects in earlier releases when you can’t see them? With a bit of LISP, or old tricks like LIST ALL Remove Crossing.

The moral of the story for drawing creators is to look before you leap whan attaching new object types. For drawing recipients, it’s something to carefully watch out for. If you’re the customer and you use an earlier release, you may even wish to include a don’t-use-this-attachment-type clause in your specifications.

AutoCAD 2009 Subscription Pack 2 – PDF Enhancements

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Subscription customers of plain AutoCAD 2009 can log on to the Subscription Center and download Subscription Pack 2. This pack improves PDF output (long overdue and very welcome) and adds the ability to attach PDF files. That’s welcome too, but is of largely academic interest right now because of a total lack of interoperability. Unless you only ever provide your drawing files to people who also have plain AutoCAD 2009 with Subscription Pack 2, they won’t see the PDF underlay. However, round tripping is supported, so when you get the drawing back the PDF underlay will reappear.

Here is a brief summary of the features, taken direct from the download page:

PDF Underlays
Now you can import PDF files, attaching them as PDF underlays. Once you attach a PDF underlay, you can use a variety of tools to snap to lines and objects, control the display of layers, move, scale, rotate, and clip the PDF underlay.

PDF Output
Key improvements have been made for publishing PDF files. File sizes have been reduced, making it easier to share designs. TrueType font support has been added, giving you control over precisely how your fonts are displayed.

This bonus pack is only available in English for AutoCAD® 2009, although, if desired, it can be installed on localized versions of AutoCAD 2009. If installed on a localized version of AutoCAD 2009, all new and related commands display in English only.

As usual, read the readme first, which contains much fuller descriptions of the new features.