|Component||Checks & Agents|
|Title||Checks may now yield the value None as plugin output|
|Checkmk Edition||Checkmk Raw Edition (CRE)|
|Compatibility||Compatible - no manual interaction needed|
A check usually returns a state, followed by text and optional perfdata. The plugin output was not well formatted, in case yield returned an empty string. It is now possible to yield None as plugin output, which instructs the Check API to ignore this value.