<p>I have a long print that keeps aborting. At some random point mid-print the printer says "Click to resume...". There is nothing in the G-code that asks for user confirmation. What could it be that triggers this? I noticed that sometimes (not every time) there is a blob of plastic in the way that should not be there.</p>

<p>On one occasion, after the "Click to resume...", the LCD showed the message <code>FY178.N16466</code> and again waited for a click.</p>

<p>The printer is an Anet A8 with Marlin 1.1.9. Slicer is Cura. I am printing via USB from Cura directly.</p>

<p>This is the error message:</p>

<p><a href="https://i.stack.imgur.com/QXdNc.jpg" rel="nofollow noreferrer" title="&quot;Click to resume...&quot; error message"><img src="https://i.stack.imgur.com/QXdNc.jpg" alt="&quot;Click to resume...&quot; error message" title="&quot;Click to resume...&quot; error message"></a></p>

This is not an answer/explanation per se, but it might help you track down the cause.
It
might
be worth
enabling logging
```
M928
```
to the SD card (ensure that the R/W tab on the SD card is set appropriately), so that (after this has happened a few times) then you can look through the log to see what the command preceding the abort was, and if it is consistently the same (sequence of) commands that cause this to happen.
```
```
M928 filename
```
```
If that doesn't throw up anything obvious, then, in conjunction with logging, you could enable debugging, see
```
M111
```
Debug level
. For example:
```
```
M111 S7 ; ECHO, ERRORS, INFO
```
```
Then run through the long print again. As before, after a few of the
click to resume print
messages, then go back and check the log for anything that might indicate why this is happening.
To subsequently disable the debugging:
```
```
M111 S0
```
```