https://forge.codesys.com/forge/talk/Engineering/thread/68f595f1b2/2022-02-10T15:16:19.175000ZRecent posts to PriviledgedInstruction Exception2022-02-10T15:16:19.175000Z2022-02-10T15:16:19.175000Zmike-at-gmshttps://forge.codesys.com/u/mike-at-gms/https://forge.codesys.com22c040dcbbd14dd3e84e3bed163abc52b8be6ecc

<div class="markdown_content"><p>Thank you, the checkbounds function identified an array problem.</p> <p>I still do not understand the exception (or why it was not thrown when the array was created) other than my code would 'sometimes' try to access restricted memory.</p> <p>The exception has not returned yet to verify all this, but I have a tool to find problems if it comes back.</p></div>

2022-02-10T08:18:11.012000Z2022-02-10T08:18:11.012000Zeschwellingerhttps://forge.codesys.com/u/eschwellinger/https://forge.codesys.comea53f77823b55434b0fd169b579f20dba47e104a

<div class="markdown_content"><p>please start to analyze the application with checkbounds first:<br/> <a href="https://faq.codesys.com/pages/viewpage.action?pageId=3538982" rel="nofollow">https://faq.codesys.com/pages/viewpage.action?pageId=3538982</a></p></div>

2022-02-09T22:19:22.358000Z2022-02-09T22:19:22.358000Zmike-at-gmshttps://forge.codesys.com/u/mike-at-gms/https://forge.codesys.com48c8a9bffb91e64b057604d192d06f0d44ffae79

<div class="markdown_content"><p>Update:<br/> I took a working project and migrated changes in small parts. I tested each change and then copied the working project to a different folder. At some point, the project started throwing the exception. I tried to compare files but the .bootinfo was not helpful.<br/> HOWEVER, I then copied the 'working' project back to the original folder. The exception remains. I have verified that the two .project files are exactly the same. If I open the 'working' project in the sub folder, it works. Same .project file in two locations, one works the other does not.<br/> On the project that does not work, I have performed a 'Clean' and rebuild and I have deleted all other files in the folder to force a rebuild. The 'broken' file is still broken even though it is the same .project file.</p> <p>What could be going on?</p></div>

2022-02-09T13:34:26.058000Z2022-02-09T13:34:26.058000Zmike-at-gmshttps://forge.codesys.com/u/mike-at-gms/https://forge.codesys.comc013991fa1ef5a19f6af080ed7ea7fe3b8ae977e

<div class="markdown_content"><p>The project is large and proprietary. The steps involved to trigger the exception also require a TCP client that is specific to this application. </p> <p>The general steps are: PLC starts, initialization complete, TCP Listener initialized, client begins TCP communication. During handshaking, an acknowledgement of the connection is retuned. While adding the ACK to a queue the exception is thrown. The TCP communications code has not changed for months. I can connect and communicate every time until the 'magic' change (not related to communications at all) causes this to stop working. And from that point on, nothing I do will allow it to work.</p> <p>I am not looking for a solution to my 'code error', I am looking for general information about the exception so I can narrow down the part of my project that has 'changed'. If I know more about the source of the error, maybe I could build a test project.</p> <p>What system generates this exception; Windows or the CodeSys runtime (I am using Control RTE V3 v. 3.5.15.0)? Why does a seemingly simple code change provoke the exception but reverting that change does not stop the exception?</p> <p>I am going to start again with my working backup and try to isolate a broken version. I will then try to compare any files I can find (like the .bootinfo files).</p> <p>Thank you.</p></div>

2022-02-09T07:40:10.814000Z2022-02-09T07:40:10.814000Zh-hermsenhttps://forge.codesys.com/u/hermsen/https://forge.codesys.com2f5fb899d049e6c275c8abdc2c07ea8a9d87ba4f

<div class="markdown_content"><p>If you post your project then maybe we can check your steps and reproduce the error.</p></div>

2022-02-09T02:13:17.173000Z2022-02-09T02:13:17.173000Zmike-at-gmshttps://forge.codesys.com/u/mike-at-gms/https://forge.codesys.comaeb638293cef31f499166d5e4b9c02743229142d

<div class="markdown_content"><p>I have project in 3.5 SP15 64bit that has been working fine for months. Today, I made a seemingly innocent change and suddenly I am getting the following exception:</p> <p><em>SOURCEPOSITION</em> App=<span>[Application]</span> area=3, offset=1422839<br/> <em>EXCEPTION</em> <span>[&lt;excpt&gt;PriviledgedInstruction&lt;/excpt&gt;]</span> occurred: App=<span>[&lt;app&gt;Application&lt;/app&gt;]</span>, Task=<span>[&lt;task&gt;CommunicationTask&lt;/task&gt;]</span></p> <p>The exception occurs on the same line of code (which has not changed for weeks) no matter what I do. Undoing the last change does not fix the problem.</p> <p>I restored an older version of the project and slowly copied the my recent changes and checked the results. I was able to get most of the changes copied before another simple change cause the exception.</p> <p>I cannot find any information about this exception.</p> <p>**What causes this exception and how do I undo a change that introduces it since it does not appear to be an actual error in my code?</p> <p>Thank you.</p></div>