Werk #17892: Avoid error in "Siemens PLC (SPS)" rule when updating to Checkmk 2.4

Component

Checks & agents

Title

Avoid error in "Siemens PLC (SPS)" rule when updating to Checkmk 2.4

Date

Apr 7, 2025

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.5.0b1 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.4.0b5	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

Checkmk 2.4 did not allow for empty values in the Ident of the value field in the Siemens PLC (SPS) rule, while this was still possible in Checkmk 2.3. In case of an empty value, the update process failed with

-| WARNING: Invalid rule configuration detected
-| Ruleset: special_agents:siemens_plc
-| Title: Siemens PLC (SPS)
-| Folder: ...
-| Rule nr: ...
-| Exception: An identifier must only consist of letters, digits, dash and underscore and it must start with a letter or underscore.
-|
-| You can abort the update process (A) or continue (c) the update. Abort update? [A/c]

As of this werk, empty values are accepted also in Checkmk 2.4.

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