PLC 1.20 missing license error

[bschmidt]

Hello,

A customer is sporadically getting a message that his PLC licenses are missing, even though we have verified that he has the PLC Basic and PLC Standard licenses that his PLC application requires. When we look the error log we see a couple of messages that seem to be related to multi-core support:

info;2024-01-23T16:31:39.145487-06:00;plc;0A0A0001;;PLC log message;;<SysCpuMultiCore> Configuration of licensed cores for IEC-tasks is invalid

info;2024-01-23T16:31:39.1449-06:00;plc;0A0A0001;;PLC log message;;<SysCpuMultiCore> Number of licensed cores for IEC-tasks: 1 from 4;plc.system;;'2024-01-23T16:31:39.14533-06:00;rexroth_diag;rexroth-automationcore;cmp_cx_util.cpp;cmpCxUtilEventCallbackFunction;585

However his PLC is only using single core:

Any ideas what could be causing this?

Best regards,

Brian

[CodeShepherd · Accepted solution]

Are there any libraries used that created their own tasks on runtime? This is often the case for external fieldbus libraries or some other CODESYS functions. Please check scheduler in the ctrlX CORE web UI while error is present.

As error seems to be sporadic, what is done right before error is occurring?