Answers.Body: <p>Apparently, all that I was missing was a <code>STOP</code> block at the end of the thread. Hopefully my oversight helps future users.</p>
  
  <p>The <code>STOP</code> block looks like so:</p>
  
  <p><a href="https://i.sstatic.net/XayUL.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/XayUL.png" alt="enter image description here"></a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-05-10T16:42:59.260Z
Answers.Text: Do you happen to have a picture of correct program with a "STOP" block to include in your answer?
Answers.UserDisplayName: Alex
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-05-10T16:45:06.480Z
Answers.Text: @Alex do you think a picture of just the STOP block would work?
Answers.UserDisplayName: Brandon_J
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-05-10T16:23:24.747Z
Answers.LastActivityDate: 2020-05-10T16:47:08.567Z
Answers.LastEditDate: 2020-05-10T16:47:08.567Z
Answers.UserDisplayName: Brandon_J
Body: <p>I pulled out my NXT recently to tinker around with it. After reconstructing one of the suggested builds, I was writing a small program for it. About halfway through, I needed to leave my work, so I tried to save the file, but I was unable to. I received the following completely straightforward and not confusing error message:</p>
  
  <p><a href="https://i.sstatic.net/Sj0n0.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/Sj0n0.png" alt="error message"></a></p>
  
  <p>The text of the error message reads</p>
  
  <p><code>Insane object at BHDP+3C18 in "Arm4Caleb.rbt": {graphics } (0x80): Loop Tunnel DCO )</code></p>
  
  <p>with Arm4Caleb.rbt being the name of the file. I have failed to find what this error message may be referring to.</p>
  
  <p>I also attempted to save a blank NXT program file; this was successful, leading me to believe that there was something wrong with my particular program. Consequently, I attach an image of the NXT program (I can't post the file because I can't save it):</p>
  
  <p><a href="https://i.sstatic.net/KsINI.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/KsINI.png" alt="program"></a></p>
  
  <p>The program is in collapsed mode so that I can screenshot it; the alternate decision for the largest switch "box" is a use of the C motor; the alternate decision for the medium box is a use of the C motor in the opposite direction; the alternate decision for the smallest box is doing nothing.</p>
  
  <p>It's been a while since I've tried this visual coding stuff; I suppose I have an error somewhere in here? I'm not sure why it would prevent me from at least saving the file, though.</p>
  
Tags: <nxt><nxt-g>
Title: Unable to save NXT program
UserDisplayName: Brandon_J
ThreadText: # Unable to save NXT program
  
  (Asked by: username_0 on 2020-04-27)
  
  I pulled out my NXT recently to tinker around with it. After reconstructing one of the suggested builds, I was writing a small program for it. About halfway through, I needed to leave my work, so I tried to save the file, but I was unable to. I received the following completely straightforward and not confusing error message:
  
  [![error message](https://i.sstatic.net/Sj0n0.png)](https://i.sstatic.net/Sj0n0.png)
  
  The text of the error message reads
  
  `Insane object at BHDP+3C18 in "Arm4Caleb.rbt": {graphics } (0x80): Loop Tunnel DCO )`
  
  with Arm4Caleb.rbt being the name of the file. I have failed to find what this error message may be referring to.
  
  I also attempted to save a blank NXT program file; this was successful, leading me to believe that there was something wrong with my particular program. Consequently, I attach an image of the NXT program (I can't post the file because I can't save it):
  
  [![program](https://i.sstatic.net/KsINI.png)](https://i.sstatic.net/KsINI.png)
  
  The program is in collapsed mode so that I can screenshot it; the alternate decision for the largest switch "box" is a use of the C motor; the alternate decision for the medium box is a use of the C motor in the opposite direction; the alternate decision for the smallest box is doing nothing.
  
  It's been a while since I've tried this visual coding stuff; I suppose I have an error somewhere in here? I'm not sure why it would prevent me from at least saving the file, though.
  
  **Tags:** nxt, nxt-g
  
  ---
  
  ## 1 answers
  
  ### Answer by username_0 on 2020-05-10. Score: 3 | Accepted answer
  
  Apparently, all that I was missing was a `STOP` block at the end of the thread. Hopefully my oversight helps future users.
  
  The `STOP` block looks like so:
  
  [![enter image description here](https://i.sstatic.net/XayUL.png)](https://i.sstatic.net/XayUL.png)
  
  > **Comments:**
  > **username_1**: Do you happen to have a picture of correct program with a "STOP" block to include in your answer?  
  > **username_0**: @Alex do you think a picture of just the STOP block would work?  
  
  ---
  
  