AMS incorrectly displays "AMS filament ran out"

Steps:

  1. Setup x1c for the first time, hook up AMS, and put only the bambu basic PLA spool.
  2. Select a bambu scraper from the built in models.
  3. Select the multicolor scraper without realizing it’s a multi multi color print. The only indication of this is that there are two boxes in the filament selector area.
  4. Select print now.
  5. Wait for the “AMS filament run out error”

Expected Behavior:

  1. When starting a print that requires two colors, but the AMS only has one spool, the lcd UI should warn the user that the print may not fully complete.
  2. When the print reaches the point it needs to do the first color change, it should display a warning along the lines of “AMS needs filament in slot 2 to finish multicolor print.”
  3. (Optional) User is given the option to continue with the original filament only.

Actual Behavior:

  1. When starting a print that requires two colors, but the AMS only has one spool, the lcd UI provides no warnings when selecting print now.
  2. When the print reaches the point it needs to do the first color change, it displays the “AMS filament run out” warning and directs the user to this wiki page The printer shows that AMS filament ran out | Bambu Lab Wiki. This sends the user down a path of looking for clogs in various locations, leading to frustration and wasted time. If a new user did not realize they were in a multicolor print, they may spend significant time trying to understand why the AMS thinks there’s no filament when there is in fact filament available.
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