List sorting does not work suddenly

I copied a pdf file from an email into a lister in Dopus (v. 13.10.5), changed the name of the file (in column Name) to correspond to names already in the lister, and expected the lister to resort. However, the renamed file does not move from its original position (it should). This has never happened to me before as far as I can remember.

If I sort on Modified (dates), sorting works just fine. The file names in the Name column contains the letter "ä", but that has not been a problem before.

I have restarted Dopus and the computer. No change.

What could possibly have changed to make this a problem?

Hans L

Please show a screenshot of the window.

I have no idaea f this is the image I wanted to post. Hopefully, it is,

Hans L

Leo, did the image I posted clarify anything?

Hans L

The space might differ from those in the other files.

What space?

Hans L

I am still interested in what you mean by "space", but I retyped the file name and deleted the old name and sorting suddenly worked. Please explain in some detail what might have happened,

Thank you, Leo!

Hans L

The standard space created by the spacebar is ASCII 32. However, you might have accidentally typed or copy-pasted something that appears as a space but behaves differently, such as a No-Break Space (ASCII 160). Other special characters, like umlauts, can also cause similar issues.

Here's a little ad-hoc script that lists the ASCII codes of the first selected file (in case you still have a copy of the offending file):

var tab = DOpus.listers.lastactive.activetab;
var item = tab.selected(0);
var str = item.name;

DOpus.Output(str);

for (var i = 0; i < str.length; i++) {
    DOpus.Output(str.charAt(i) + '\t' + str.charCodeAt(i));
}

A list of the exact filenames should help here. Please select them all, then open the Edit menu and choose the option to copy the names and paste them into a reply.