Crash on preview render in GFUI

I was doing an engrave of a sign on Proofgrade Maple and after a very long planning session it finally completed and told me it was going to be a 4 hour engrave (amazing for a 23K SVG) and it starts to draw the preview (the red demo animation on the bed) it animated the first maybe 1/4" and then I got the “sorry an error occurred”. Default settings for engrave (graphic) and cut.

NGB Hanging (7.5 KB)

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Lower the LPI on the engrave to about 195. (Sorry its short …on a tablet.)

Although interestingly this is the first crash I’ve ever had on the preview, not the motion planning phase… I was more reporting it as a bug

Can’t say for sure yet but also appears to be a rendering time cap.
Something around 3 hours.

Anyone ever had a 3+ hour stay in the game?

yep. with this specific Glowforge PRU

That post says you split 6 hours into 4 1.5 hour sections.

I think the limit is a little over 3 hours but it seems to be new behaviour that it tells you how long it will be before it bombs out.

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Thanks for letting us know about this, @henryhbk. We’re looking into it. There’s a problem with our software in handling very large engraves and it looks like that what’s happening here.

In the meantime, it may help to divide your image into pieces and print them one at a time, as shown below.

  1. Split your image into pieces
  • Save your design as a PNG file
  • Go to and upload your file
  • Click on the “SPLIT IMAGE” tab and enter the number of rows and columns you want to split your image into
  • Choose PNG
  • Click the blue “SPLIT IMAGE” button. The software will split your image into the number of rows and columns you specify and automatically download a zipped file of the pieces.
  1. Create a single file with all the pieces
  • Locate the file on your computer (where your downloads go) and unzip it
  • Mac: Double click on the file to open it
  • Windows: Double click on the file to open it, then click “Extract All”
  • Open a new file in Inkscape (used for this example, although other software will work too)
  • Choose File > Import and select all the images from the zip file
  • Line up the images up so they are seamless. In Inkscape, when you drag the images near each other, they will snap together. (If they don’t, go to View > Show/Hide > Snap Controls Bar and adjust the settings.)
  • Select File > Save As and save the file as an Inkscape SVG file
  1. Upload and Print
  • Sign in to, click “Upload” and choose the file you savedEach piece of artwork will import as a step in the app. Click on a step and choose “Ignore.” Ignore all the steps but one, and then press “Print.”
  • When that print finishes, leave your material in place
  • Set the step you printed to “Ignore” and print another step
  • Continue ignoring and printing until you’ve finished

Please let me know if this helps!

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It’s been a little while since I’ve seen any replies on this thread so I’m going to close it. If you still need help with this please either start a new thread or email