https://forge.codesys.com/forge/talk/Engineering/thread/0d39d14c93/2020-02-27T13:58:44.978000ZRecent posts to Sysmem, unresolved references at download2020-02-27T13:58:44.978000Z2020-02-27T13:58:44.978000Ztimvhhttps://forge.codesys.com/u/timvh/https://forge.codesys.com3f40c816a3fa75e8dda69651812b84d6be06c2ca

<div class="markdown_content"><p>You cannot add them. The PLC vendor should do this. It is part of their runtime implementation.<br/> If they are different devices running CODESYS, then yes, it could be possible that one supports it and the other not.</p> <p>Unfortunately there is not much you can do about it (as far as I know).<br/> The only thing you can do is choose another version of the device you are using (Could be e.g. CAN Master).<br/> Maybe this version uses libraries which don't use the missing libraries.</p> <p>Right click on the devices in your PLC application and choose "update device".<br/> Then choose to show all versions. Maybe one of the earlier versions works better.</p></div>

2020-02-27T13:58:44.680000Z2020-02-27T13:58:44.680000ZT Mattssonhttps://forge.codesys.com/u/t-mattsson/https://forge.codesys.com5cf6c85f5c8668e543d4b0b9aefa67162397cc8f

<div class="markdown_content"><p>Thanks for the reply. I have contacted my PLC vendor, I´m just impatient, and they didn´t seem to recognize the problem.</p> <p>I have found these functions in the library that handles the CANopen stack now.<br/> Could it be any of the devices on the bus that doesn´t have the library or only the target for my project to which I download the project?<br/> If one or more of the devices on the bus doesn´t have these external libraries, is it possible that I could add them?</p></div>

2020-02-27T13:58:44.336000Z2020-02-27T13:58:44.336000Ztimvhhttps://forge.codesys.com/u/timvh/https://forge.codesys.coma5c5be07782220c78364d21da2f7ee7bebb07811

<div class="markdown_content"><p>Most likely your PLC doesn't support this functionality.<br/> Please ask your PLC vendor.</p> <p>The development tool gets this information from the runtime when it tries to download it to the device, but the device doesn't have these external libraries linked to the runtime.</p></div>

2020-02-27T13:58:43.979000Z2020-02-27T13:58:43.979000ZT Mattssonhttps://forge.codesys.com/u/t-mattsson/https://forge.codesys.com371ac8ef111ca81e39900ef6f44470a8d3de5fd3

<div class="markdown_content"><p>Trying to download a new project I get the following download errors (no reported build errors or CANbus errors):</p> <p>Unresolved reference: 'SYSMEMFREEDATA'<br/> Unresolved reference: 'SYSMEMALLOCDATA'<br/> Unresolved reference: 'SYSMEMCPY'</p> <p>Does anybody have an idea about where to start looking?<br/> Could it be related to the IO mapping? AT declarations?<br/> Can it be affected by the installed versions of devices or buses? Or libraries?<br/> Please share ideas and experiences!</p> <p>Regards</p></div>