Removing the Byte-Order-Mark (BOM) from a blob can be accomplished with the following code:

CONVERT FROM TEXT(Convert to text($blob;"utf-8");"utf-8";$blob)

Here is a method that utilizes this technique for removing the BOM from a document:

$vhDocRef:=Open document("") // Select the document of your choice If (OK=1) // If a document has been chosen    CLOSE DOCUMENT($vhDocRef) // We don't need to keep it open    DOCUMENT TO BLOB(Document;$docBlob) // Load the document    If (OK=0)        // Handle error    Else        // OK!       CONVERT FROM TEXT(Convert to text($docBlob;"utf-8");"utf-8";$docBlob)       BLOB TO DOCUMENT(Document;$docBlob)       End if    End if

Using the method above, you are first prompted to open a file. The file is then loaded into a Blob and then converted back and forth in order to remove the BOM. The Blob is then saved back to disk.