In order to replace images in 4D Write Pro, you must first get a collection of all images in the document, select the image within that collection, and insert a new image at that range. The example code is shown below that will replace the 2nd image in a 4D Write Pro document.

C_LONGINT($imgNum_l) C_OBJECT($range_o;$cat_e) C_COLLECTION($elements_c) // Select entire document and find all image elements $range_o:=WP Get body(WPArea) $elements_c:=WP Get elements($range_o;wk type image) // Replace 2nd image $imgNum_l:=1 $cat_e:=ds.Cat.all().first() // If the image is not out of range of the collection If ($imgNum_l<$elements_c.length)       // Insert new picture    WP SELECT(WPArea;$elements_c[$imgNum_l])    $range_o:=WP Selection range(WPArea)    WP INSERT PICTURE($range_o;$cat_e.img;wk replace)       // Resize the newly inserted picture    $range_o:=WP Get body(WPArea)    $elements_c:=WP Get elements($range_o;wk type image)    WP SET ATTRIBUTES($elements_c[$imgNum_l];wk height;"250pt")       // Deselect the document    WP SELECT(WPArea;0;0) End if

In this example, there are 3 images in this document where the 2nd image will be replaced with a new image. The trick here is when the newly inserted image needs to have its attributes changed, the elements collection must be reupdated to assure the new image is in that collection. In this case, the newly inserted images size is resized immediately after being inserted.

Before insertion:


After insertion: