I want to suppress: useCS = logical 1 in command window

This "spam" repeats over and over in the command window. I want to suppress this.

useCS =

logical

1

useCS =

logical

1

[David]

In debug mode (output) I got this:

I tried several solutions suggested by grok/chatGPT but none of them worked. Im using R2026a so it might be a internal bug.

useCS = logical 1 Attempt to modify the tree during an update traversal. Error in matlab.graphics.interaction.internal.UnifiedAxesInteractions.setDefaultBehaviorForText

Error in matlab.graphics.interaction.internal.UnifiedAxesInteractions.setDefaultBehaviorForTextArray

Error in matlab.graphics.interaction.internal.UnifiedAxesInteractions.createCartesianAxesTextInteractions

Error in matlab.graphics.interaction.internal.UnifiedAxesInteractions.createInteractionsForTitlesAndLabels

Error in matlab.graphics.interaction.internal.UnifiedAxesInteractions.createDefaultInteractionsInSync

Error in matlab.graphics.interaction.internal.UnifiedAxesInteractions.createDefaultInteractions>@()matlab.graphics.interaction.internal.UnifiedAxesInteractions.createDefaultInteractionsInSync(ax,is2dim,numDataSpaces)

Answer 1

[Star Strider]

Without knowing more about your code or what it is dooing, see if puttting a semicolon (;) at the end of the line that assigns 'useCS' solves the problem.

(There is not enough information provided to suggest any other solution.)

EDIT -- (15 Dec 2025 at 01:48)

Since you are using the R2026a pre-release, you need to contact the appropriate support at MathWorks. This may be a bug they need to know about.

Also, if you have access to R2025b, see if it produces the same error.

.

Answer 2

[Steven Lord]

You can tell MATLAB to enter debug mode when unsuppressed output occurs. Use this to determine where the semicolon on the line that assigns to the useCS is located, then add the semicolon.

Answer 3

[Sean de Wolski]

This occurs for me (26a-prerelease) when adding a ConstantLine to a ChartContainer. Stopping unsupressed output throws the update traversal error and then it stops in space

>> dbstop if 'unsuppressed output'
    >> myChartContainer
    
    ans = 
    
    useCS =
    
    logical
    
    1
    Error using matlab.graphics.axis.Axes/addNode
    Attempt to modify the tree during an update traversal.
    
    Error in matlab.graphics.interaction.graphicscontrol.InteractionObjects.DatatipsClientHoverInteraction/initMarker
    
    Error in matlab.graphics.interaction.graphicscontrol.InteractionObjects.DatatipsClientHoverInteraction
    
    Error in matlab.graphics.interaction.interactions.DataTipInteraction/createWebInteraction
    
    Error in matlab.graphics.interaction.interactioncontainers.StandardAxesInteractionContainer/createWebInteraction
    
    Error in matlab.graphics.interaction.interactioncontainers.BaseAxesInteractionContainer/createDefaultWebAxesInteractions
    
    Error in matlab.graphics.interaction.interactioncontainers.CartesianAxesInteractionContainer/createDefaultWebAxesInteractions
    
    Error in matlab.graphics.interaction.interactioncontainers.BaseAxesInteractionContainer/setupInteractions
    
    Error in matlab.graphics.interaction.internal.UnifiedAxesInteractions.createDefaultInteractionsOnAxes
    
    Error in matlab.graphics.interaction.internal.UnifiedAxesInteractions.createDefaultInteractionsInSync
    
    Error in matlab.graphics.interaction.internal.UnifiedAxesInteractions.createDefaultInteractions>@()matlab.graphics.interaction.internal.UnifiedAxesInteractions.createDefaultInteractionsInSync(ax,is2dim,numDataSpaces)
    
    K>>