Invalid request. The action to perform is missing. ERR_BUTTON_EXPECTED (4).

 

This error message may appear in several cases:

- a link is specified in the HTML page using the [%URL()%] syntax without a button name among the parameters:

 Solution:

 you must specify in the link parameters the name of the WebDev page button corresponding to the action to perform.

 

- a button existing only in the HTML page has been clicked. This button doesn't exist in the page.

 Solution:

 The buttons found in the HTML page must also have an equivalent in the corresponding WebDev page.

 

- a form is validated without using a button (using JavaScript code) or using the ENTER button.

 Solution:

 You need to use a button to validate a form.

 

Tip:

 To let web users validate a form using the ENTER key, you need to:

Define a "Validation" type button in the WebDev page by associating it the ENTER shortcut letter ("Details" screen of the control).

 

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