https://forge.codesys.com/forge/talk/CODESYS-V2/thread/8e87343ab1/2020-02-27T22:36:48.468000ZRecent posts to runtime error #20, task=unknown. Shed any light?2020-02-27T22:36:48.468000Z2020-02-27T22:36:48.468000ZMrkTrussellhttps://forge.codesys.com/u/mrktrussell/https://forge.codesys.com24346e9a310a95d4a22b3ad5d0fc6ff5dede2f70

<div class="markdown_content"><blockquote> <p><strong>Zitat:</strong><br/> ...after a while of headbanging it turned out to be a hardware configuration causing the problem (an internal coupler wasn't defined). </p> </blockquote> <p>I realize this was ~4 years ago, but I was wondering if you remember exactly what internal coupler wasn't defined. I keep getting this same error and it is driving me crazy! </p> <p>I have an ABB AC500 PLC (PM591 CPU w/Internal Ethernet and two DC532 I/O blocks). I have appended the subelements: (2) DC532's and (1) PM5x1-ETH - Internal-Ethernet<span>[SLOT]</span>.</p> <p>Am I missing something?</p></div>

2020-02-27T22:36:46.734000Z2020-02-27T22:36:46.734000ZNavhttps://forge.codesys.com/u/nav/https://forge.codesys.com67895f9d75a9fe5e4c7716edc2e18eff430fc448

<div class="markdown_content"><p>thanks for your response. </p> <p>after a while of headbanging it turned out to be a hardware configuration causing the problem (an internal coupler wasn't defined).</p> <p>Cheers,</p> <p>Nav</p></div>

2020-02-27T22:36:42.298000Z2020-02-27T22:36:42.298000Zanni-reddyhttps://forge.codesys.com/u/anni-reddy/https://forge.codesys.com81a240bcf77a35f27240389b98f65986d1b11654

<div class="markdown_content"><p>hi nav</p> <p>put a breakpoint and check line by line then u will come to know where u have the problem</p> <p>or</p> <p>please attach the source code i.e. project(.pro file).</p></div>

2020-02-27T22:36:40.725000Z2020-02-27T22:36:40.725000ZNavhttps://forge.codesys.com/u/nav/https://forge.codesys.comb83950d377baebea80024c352e1aeb0ff8ea6477

<div class="markdown_content"><p>Hi guys,</p> <p>Just wanted to know if anyone could shed some light on this matter. It happens to almost all projects I work with. The below example is for downloading into a PLC using a USB to Serial converter but I've used ethernet as well and the same problem happens.</p> <p>You can see from the three screenshots attached what's going on.</p> <p>In the first, I just go to online-&gt;run and after the codes been compiled and downloaded the following message happens (Runtime error #20 (task=unknown) )</p> <p>It doesn't log me out. I'm unable to 'run' the program as shown in screenshot two. However, If i go to 'single cycle' the program starts working. If i go to 'Run' again I'm able to run it.</p> <p>So I'm able to download the program onto my PLC but this error just keeps coming up, can anyone shed any light onto it?</p> <p>Cheers,</p> <p>Nav</p> <p><img alt="IMG: runtime_3.JPG" rel="nofollow" src="https://forum.codesys.com//download/file.php?id=131"/></p> <p><img alt="IMG: runtime_2.JPG" rel="nofollow" src="https://forum.codesys.com//download/file.php?id=130"/></p> <p><img alt="IMG: runtime_1.JPG" rel="nofollow" src="https://forum.codesys.com//download/file.php?id=129"/></p></div>