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Werk #19376: Custom graphs: Nested calculations restored incorrectly in the graph editor

Component User interface
Title Custom graphs: Nested calculations restored incorrectly in the graph editor
Date Oct 27, 2026
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.5.0p18 Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

In the custom graph editor, a calculation built on top of another calculation, for example (Memory total / Memory used) * 100, was not restored correctly after saving. The editor and the column "Formula" showed only the last step, here the constant 100, so the graph in the editor showed a constant line. Dissolving the calculation did not bring back its original parts either. Graphs shown in dashboards were not affected.

Nested calculations are now saved with all intermediate steps, and the editor restores them correctly. Custom graphs saved before this fix are restored correctly as well, so they can be opened and saved again without losing their formula. Intermediate steps of such graphs get a default title and color.

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