How to handle errors

This section explains how to handle the different errors that may occur during the STM32cube Monitor experience. Errors can occur either while designing flows and nodes, or while executing the dashboard.

1. Design mode errors

In design mode view, error and warning notifications are managed in the ways described below.

1.1. Node configuration

If the node configuration is erroneous, a red triangle icon is displayed at the top-right of the node, and the text box for the missing parameter is outlined in red when editing the node.


This issue is solved by entering the missing parameter.

1.2. Node status

When an error on connection or configuration occurs, both the shape and text status information of the impacted node is updated to inform the user of the error and give some textual details. See for further information.


Solutions to the issue may differ, depending on the impacted node and the status. Some examples and their possible solutions are given in the following table:

Node Error Possible solution
acq in or acq out not connected ! Device not found (6) Verify the physical connection of your board
processing processing off - following outputs not valid : <expression> Correct the non-valid expression and/or statistic
processing processing off - variable node not present or disabled Verify the processing Group Name property
variable snapshot - invalid trigger Verify that you have snapshot-capable firmware
variable off - invalid frequency Change the sampling frequency

1.3. Parameter editing

During the edition of a parameter, while the value is not valid (empty, too short, of the wrong type and so on), the editor box is outlined in red.


1.4. Notification


2. Dashboard errors

Both acq in and processing nodes have an error output where error and warning messages are sent. For notification of these errors, the ports can be connected to a debug node, a notification node, or both. Output message topics can take two values: error or warning depending on the level of issue. Using the switch node, the topics can then be filtered and treated separately. An example flow is given below.


See and to get more details on debug and switch nodes.