App-V Sequencer 5.x cannot sequence apps with filenames "CO_x" (Error 0x8007139F). But it is possible !!

Recently I came across the App-V technical document stating that

"The App-V 5.x Sequencer cannot sequence applications with filenames matching "CO_<x>" where x is any numeral. Error 0x8007139F will be generated."

So I ran a quick test to confirm on the same.I used App-V 5.1 sequencer and App-V 5.1.86 client for testing.

During monitoring phase, I created a New folder in desktop for convenience.I then created 3 new files with different extensions (CO_123, CO_456.txt, CO_897.dll) and then proceeded stopping the monitoring phase. I was expecting that sequencer will throw an error or fail as mentioned in the Microsoft technical document. To my surprise sequencer completed without any issues. I was able to see the files in Package Files tab in the sequencer package editor.

To confirm, I also published the test package in a standalone machine and saw those files getting reflected.

UPDATE 6/22/2017: One of my friend Roy Essers had a query asking whether this happens when sequenced to PVAD. Since I didn't test this scenario in PVAD, I quickly ran a test by enabling the sequencer with -EnablePVADControl and gave c:\program files\CO as PVAD folder.

In that folder I then created the below files.

After creating I stopped the monitoring and sequencer didn't show any error even this time. It successfully created the package. Even in client testing it got succeeded.

So to finalize, App-V 5.1 Sequencer can sequence apps with filenames having "CO_<x>" without any issues. This is just a experimental test scenario and if anyone have faced the issue having CO_<x> in their package while sequencing, kindly comment below about the application. I will be happy to validate it further and update this blog post.


  1. Hi,

    I am facing difficulty with Sequencing CATIA V5 on App V5.0/5.1.More specifically, When we try to save the package it takes too long time and does not save and shows an error.
    I did tried on VM and Normal Machine also

  2. Hi,
    I am not able to sequence the apps which are in win-7 from 4.6 to 5.x version for Win-10, can you please guide on this.