https://forge.codesys.com/forge/talk/Engineering/thread/8aee3cbfcb/2021-09-09T13:29:02.882000ZRecent posts to Issue after upgrading to a PI42021-09-09T13:29:02.882000Z2021-09-09T13:29:02.882000Zmrbravehttps://forge.codesys.com/u/mrbrave/https://forge.codesys.com64e206fa72e979d2d8a2f348cad463c331b6654c

<div class="markdown_content"><p>Hello!<br/> I have encountered this problem if the runtime is updated but the project setting is still set to a specific compiler version. Check under "Project Settings &gt; Compile options" and make sure the project settings matches your compiler version (IDE version). </p></div>

2021-05-29T20:26:17.913000Z2021-05-29T20:26:17.913000Zsloobhttps://forge.codesys.com/u/sloob/https://forge.codesys.com3238781bad5c98f8aa1132eb90e9412bbd32cf43

<div class="markdown_content"><p>Hi, I've recently upgraded from a PI2 to a Pi4 and I cannot get my program working. At first I just swapped the SD card from the PI2 to PI4 and the program ran for a few seconds and then crashed.<br/> I later reinstalled PI os and upgraded the runtime/device(in codesys) to version 4. but my program won't compile and gives me the following error:</p> <div class="codehilite"><pre><span></span><span class="o">[</span><span class="n">ERROR</span><span class="o">]</span><span class="w"> </span><span class="n">raspberry</span><span class="w"> </span><span class="nf">pi</span><span class="w"> </span><span class="n">peripherals</span><span class="p">,</span><span class="w"> </span><span class="mf">4.0.0.0</span><span class="w"> </span><span class="p">(</span><span class="mi">3</span><span class="n">s</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="n">smart</span><span class="w"> </span><span class="n">software</span><span class="w"> </span><span class="n">solutions</span><span class="w"> </span><span class="n">gmbh</span><span class="p">)</span><span class="err">:</span><span class="w"> </span><span class="nl">C0521</span><span class="p">:</span><span class="w"> </span><span class="n">The</span><span class="w"> </span><span class="n">library</span><span class="w"> </span><span class="ss">"raspberry pi peripherals, 4.0.0.0 (3s - smart software solutions gmbh)"</span><span class="w"> </span><span class="n">was</span><span class="w"> </span><span class="n">created</span><span class="w"> </span><span class="k">with</span><span class="w"> </span><span class="n">the</span><span class="w"> </span><span class="k">unknown</span><span class="w"> </span><span class="n">compiler</span><span class="w"> </span><span class="n">version</span><span class="w"> </span><span class="ss">"3.5.16.0"</span><span class="p">.</span><span class="w"> </span> </pre></div> </div>