How to remove the error icon for correct ST-code?

If you enter and save a faulty ST-code, the ST-code is highlighted as faulty and the icon images/download/attachments/405733678/IconError-version-1-modificationdate-1529909643654-api-v2.png is displayed on the left edge. Usually this highlighting and the error icon are removed right after the faulty ST-code has been corrected. However, it is possible that the highlighting and the error icon are not removed in case of certain scenarios.

Example

PROGRAM Test
VAR
   Var1 : INT;
END_VAR
  Var1 := ADD(IN1 := 2, IN2 = 1);
  (* 'IN2 = 1' in this line is highlighted as error. The error icon is displayed for this line. *)
  (* When correcting 'IN2 = 1' to the correct syntax 'IN2 := 1', 'IN2 := 1' is still highlighted as error. The error icon is still displayed for this line. *)

Workaround: Save the corrected ST-code so that the highlighting and the icon images/download/attachments/405733678/IconError-version-1-modificationdate-1529909643654-api-v2.png are removed.

logi.cals recommends to install and use the most current versions of logi.CAD 3 and the runtime system so that the latest features and problem fixes according to the release notes are provided in the used version.

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