How to stabilize a Scapple file?

cl
clhoke
Posts: 7
Joined: Sat Aug 08, 2015 5:53 pm
Platform: Mac

Sun Jan 29, 2017 12:28 am Post

Hi Folks,
I have been a very happy user of Scapple for a couple of years, and have come to depend on it as a way to assemble images and associated plot notes for writing that I'm doing in Scrivener. It really works for me to move the images and notes around together as I think about the relationships, the characters, and the places where action takes place.

The size of the file has grown, over time, to about 320MB.

Recently I find that I'm unable to save or edit the file. I can neither add material to it, nor remove material and resave. It crashes every time and after any edit at all.

I've created new Scapple files and tried to copy images from the original file to a new one, thinking to delete them in the original and reduce the original file's size (I can't think of any other problem that might be causing the crash..) But can't do that, either. I can do the edits ok, but trying to save the original file after removing some images just causes it to crash.

So I think I have two questions:
[list=][/list]How can I stabilize the file I have? (Some sort of export/import routine, maybe?)
[list=][/list]Does anyone have suggestions on what might be causing the crash in the first place. Everything was perfectly stable for months prior.

MacOS is 10.12.3
MacBook Pro
2.8 GHz Intel Core i7
16 GB of memory

Thanks in advance for any suggestions!

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AmberV
Posts: 20612
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Platform: Mac + Linux
Location: Santiago de Compostela, Galiza
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Mon Jan 30, 2017 4:11 pm Post

Scapple doesn’t use a database or any kind of large-scale storage system, but rather a simple single text file (in XML format), so it’s probably running into memory issues trying to load and continually save a file that is as large as you describe. It’s worth noting you are well beyond the design intents of the software. This is the sort of thing where it can work fine up until a certain point, and then start sporadically causing problems until finally not working at all.

Salvaging could be difficult—if you have access to a more powerful computer that might help, and what I would do then is break apart the file into maybe a dozen smaller boards and see if those load more efficiently on your main computer. Of special note is the File/Export/Images... menu command. If you can get the file open at all, that is what I’d be trying to do first.

The next thing to do is get the data stable. One brute force approach that comes to mind is to wipe out the graphics data from the file using a command line tool. A command such as the following should suffice:

Code: Select all

sed -E 's/<ImageData.*Name="([^"]*).*/<String>\1<\/String>/'


You would want to leave a space on the command line after that part, then drag and drop your Scapple file into the window, followed by typing in > ~/Desktop/cleaned.scap, then pressing return (so the basic structure of the command is sed -E 'search_replace_pattern' input.scap > output.scap). The result will be a new Scapple file (the original will be untouched, but make a copy of the original if you haven’t) on your Desktop with every image removed and its node position replaced with the name of the original image in the text of the note—so all connections and styles will be preserved. If it doesn’t work right, it probably won’t open at all—I didn’t test the command extensively on but a few simple .scap files with test images. If you know a thing or two about regular expressions you might be able to fine-tune the search pattern.

So optimally you could get all of the images exported to files and then a copy of the board with their file names printed in their positions instead of the images, meaning the whole thing could be gradually put back together more efficiently.

To that end, and with the thought of not having to sacrifice how you work as a strategy going forward, two tips can save you a lot of space and maximise the quantity of images you use:

  • Scale the images to size before importing them into text file formats like RTF and Scapple files. The little handles and resize tools in these programs may be convenient, but they don’t solve any underlying issues of scale.
  • Use software that can save clean and simple images with little to no meta-data. Some programs by default insert large amounts of meta-data and thumbnail information—sometimes in excess of the image itself. A tool like Photoshop’s web save export can keep a file down to just the bytes necessary to display it, and also help in keeping what bytes we do use as efficient as possible.
Like I say that’s more of a strategy going forward. It would be a lot of work to do this retroactively, but if you can get all of the graphics exported and then clean the file using a technique such as described, you could go through and clean them up, pasting them back in as you go.

To put it into perspective, if you used images around 4 to 6cm square and compressed them reasonably well, you could probably fit around 25,000 graphics into 320mb. Or a better way of putting it is that under normal usage you wouldn’t get close to 320mb in a single file.
.:.
Ioa Petra'ka
“Whole sight, or all the rest is desolation.” —John Fowles

cl
clhoke
Posts: 7
Joined: Sat Aug 08, 2015 5:53 pm
Platform: Mac

Fri Feb 03, 2017 6:25 am Post

What a beautiful, thoughtful response! Thank you so much for taking the time.
I think you're very likely right; makes perfect sense.
I'll give this approach and try and let you know how it turns out.

Thanks again.

cl
clhoke
Posts: 7
Joined: Sat Aug 08, 2015 5:53 pm
Platform: Mac

Fri Feb 03, 2017 6:25 pm Post

OK, I've done as you suggested and it all worked like a champ!
Exporting the images worked just fine, and the sed script cleaned things up as you indicated.
I'll go through the images and resize them, and (in the future) resist the temptation just to resize the image within Scapple.

Thanks again. I appreciate the time you took to help me on this.

Creighton

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AmberV
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Fri Feb 03, 2017 7:40 pm Post

Excellent! Glad to hear it all worked as planned, I was most worried about it getting opened to export the images. We could have probably hacked the file in half with a text editor in a worst case scenario. Hope you can get it all put back together without too much trouble.
.:.
Ioa Petra'ka
“Whole sight, or all the rest is desolation.” —John Fowles