Yep – it was my fault.  I’ve fixed it.  Sorry to mess you around but your 
question did push me to the answer – so for me it was worthwhile.

From: [email protected] 
[mailto:[email protected]] On Behalf Of Paul Offord
Sent: 29 September 2016 22:34
To: Developer support list for Wireshark <[email protected]>
Subject: Re: [Wireshark-dev] Apply as Column not working correctly

Hi Jeff.  Scrap that.  My dissector break point was after an if statement that 
fails.  I think I have a logic problem in the transum dissector.  I’ll work on 
it.

From: Paul Offord
Sent: 29 September 2016 20:49
To: 'Developer support list for Wireshark' 
<[email protected]<mailto:[email protected]>>
Subject: RE: [Wireshark-dev] Apply as Column not working correctly

Hi Jeff, Yes that’s what I’m saying.

From: 
[email protected]<mailto:[email protected]> 
[mailto:[email protected]] On Behalf Of Jeff Morriss
Sent: 29 September 2016 20:43
To: Developer support list for Wireshark 
<[email protected]<mailto:[email protected]>>
Subject: Re: [Wireshark-dev] Apply as Column not working correctly



On Thu, Sep 29, 2016 at 3:21 AM, Paul Offord 
<[email protected]<mailto:[email protected]>> wrote:
Hi,

I’m debugging a problem with the transum dissector.  Repro steps are:


•        Right click on a TRANSUM RTE Data value such as APDU Rsp Time and 
choose Apply as Column

•        The column is added with the correct heading

•        If I look at the Column preferences I see the APDU Rsp Time column 
with a type of Custom and the correct field name of transum.art

•        I get a single callback through my dissector with 
PINFO_FD_VISITED(pinfo) == TRUE for frame 1 which is the frame I am displaying

•        None of my other callbacks are called
Are you saying your dissector isn't called again for any other frames?


•        The APDU Rsp Time for frame 1 shows correctly in the column

•        No other APDU Rsp Time values appear in the packet list even though 
the tree is correctly constructed in the packet detail area
So this means that if you click on, say, frame 2 (so you can see the packet 
detail area) the column is still not filled in?  Does your dissector get called 
when you click on the frame (it should be called--with 'tree' set).

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