Multiplicitity 4.2 Beta Feedback

Known issues

While we appreciate all feedback, please remember that we offer no official support for beta \ preview \ developer channel versions of Windows. If you report issues while in any of those early release channels, you should not expect them to be addressed unless it still exists in a retail version of Windows.

• TBD

***Reserved***

All, the Multiplicity 4 beta has been updated.  For details, please see:

https://forums.stardock.com/540065/get;3985292

As always, thanks for the time, feedback, and support.

Sean Drohan
Product Lifecycle Manager

Why not include a link for downloading it?

Also, is another version coming sometime?

With the previous beta copy/paste of a file from one PC to another in KVM mode didn't work for me, but did work, although a bit strangely, in the earlier released version.  Here's my current Windows version:

I've refreshed windows in the meantime.  The other PCs are not available now.  Sorry about that.  I'll understand if you don't want to look at it without more current information.  I'll try it again with the latest beta when I get a chance.

By the way, my email address is wrong in the image above.   

Moderator: Please do not use your private email as this is a public forum and your security will be compromised. If your email needs correction, please do it via your account.

There is a link to your account product download page up there

If you don't see it in there, perhaps, you have some issue with your account. Please report back here.

Thank you,

Basj,
Stardock Community Assistant

FYI, the date on the 4.0.8.1 Beta Changelog is wrong.  Should be 2026 not 2025.

I have run into issues with Show Remote Monitor and Show in Monitor. Note, my primary PC has 5 monitors in 2 rows.

I have 3 monitors on the remote computer and when I use Show Remote Monitor and select Monitor 1 it works fine.  Selecting Monitor 2 or Monitor 3 doesn't change what it is shown (still showing Monitor 1).  Happens in fullscreen and non-fullscreen.

Show in Monitor rarely ends up on the monitor I selected.  For example, selecting Show in Monitor 1 ends up moving it to Monitor 4 (after the move Monitor 4 is checked in the Show in Monitor menu).  It does appear to work correctly if the monitor I select is the next in the list (i.e. It is currently on 2 and I select 3 it will go to 3; also works going from 5 (last) to 1, but not reverse order).

When Multiplicity connected this morning, it didn't show up on any monitor (showed on taskbar like normal).  I had to turn off a monitor on the primary PC to get it to show (causing windows to refresh what displays are attached).  Today this only happened when connecting, but I believe it happened a few times last night when using Show in Monitor.

Last night I was on 4.07 then I upgraded to 4.0.8.1 Beta this morning before trying it.

I have used the Seamless tab as the guide to determine what Monitor number is which physical monitor since those numbers match what actually gets checked in the Show in Monitor menu.  It was confusing last night until I realized the numbering in the Seamless tab didn't match the number in Windows settings.  It would be helpful if they matched.

FYI, the numbers on the Seamless tab last night when 4.07 was installed were different than today with 4.0.8.1 installed.  Monitors 1 & 4 still referred to the same physical monitors, but the other 3 switched.

Primary PC Windows 11 Display Settings:

Secondary PC Windows 10 Display Settings:

Monitor 3 above corresponds to Monitor 1 in Multiplicity and is the primary in Windows.

The Secondary PC monitors are the same physical monitors as 1, 3 & 4 on the Primary PC (plugged into different ports).  I had hoped Multiplicity wasn't limited to viewing 1 monitor at a time so I could switch the 3 monitors back and forth between the two PCs.

Primary PC Windows Version:

Secondary PC Windows Version:

Hello,

Sorry to hear you are having issues. Please create your own new thread for more specific to your own systems issue. We will try to help over there. This thread is more into general feedback thread.

Thank you,

Basj,

Stardock Community  Assistant.

I've been testing Multiplicity 4.08 Beta in a broadcast environment, and I'm still seeing what appears to be a reproducible resource leak in KVM mode.

Test environment

• Multiplicity 4.08 Beta
• KVM mode
• Windows 10 22H2
• NVIDIA GPU
• Long-running LAN-only sessions (8–10 hours typical)
• 2 Test Machines (Dell Latitude 3930)

Reproduction
Repeatedly disconnect and reconnect the KVM session.

Observed behaviour

• Handles continue to increase after each reconnect and are not released until MultiPLV64.exe exits.
• Commit size also continues to grow after each reconnect. There is an initial spike (~300 MB) during connection, but it settles 40–50 MB higher than before each reconnect.
• Thread count gradually increases from a baseline of ~27–30 to ~50+ after repeated reconnects.
• GDI object count remains stable.

Example from 4.08:

• Initial:
  • Handles: 534
  • Threads: 27
  • Commit: 481 MB
• After 20 disconnect/reconnects:
  • Handles: 2,561
  • Threads: 50
  • Commit: 1,328 MB

The leaked resources are only released when MultiPLV64.exe is closed or the machine is rebooted.

After enough reconnects, I also begin seeing system-wide degradation:

• TightVNC temporarily disconnects.
• SMB/network drive mapping fails.
• Applications take much longer to start up.
• In production, we've also experienced eventual black-screen hangs requiring a reboot.

The 4.08 beta changelog mentions fixing a memory leak in long-running KVM sessions, but from my testing, the reconnect path still appears to leak resources.

Hello,

Sorry to hear you are having issues. I have forwarded your problem/question to Stardock Support Team for their assistance. Please keep an eye on this thread for any updates. We appreciate your feedback and patience. Thank you.

Basj,

Stardock Community  Assistant

Hi G-Park,

Thank you for posting.  Can you check the exact file version of your MultiplicityConfig.exe file on all (primary and secondary) PCs?  Just want to confirm you have the exact latest beta version released on each.

 Should be in: 

• C:\Program Files (x86)\Stardock\Multiplicity 

MultiplicityConfig.exe -> Properties -> Details -> File version should be 4.0.8.1

Best regards,

Adam McGuinness
Stardock Support Specialist

Hi Adam, 

Correct - we are using 4.0.8.1.

Thanks,
Jordan

Hi Jordan,

Thank you for checking that, and for your repro data.  I will have this logged.

Internal reference: ODNT-12488

Thanks again,

Adam McGuinness
Stardock Support Specialist

Hello all,

Multiplicity 4 beta has now been updated to version 4.2.  For details, please see:

https://forums.stardock.com/540065/get;3985292

Thank you for your time, feedback, and support.

Best regards,

Adam McGuinness
Stardock Support Specialist

Hi everyone,

I currently have 2 issues with Multiplicity (both beta and stable were tested and did not work)

Seamless clipboard is not working as intended at alçl, breaking whatever app i paste into from either computer.
My seamless display is not configurable. meaning i cannot tell multiplicity where my screens go. in this specific example it would be support1 main1 support2, and unfortunately support1 and support2 cannot be split and placed properly on the seamless display tab.

Considering the copy-paste is essential to my workflow, i would really appreciate either some guidance to fix this or some fix released ASAP (it was fully working before).

Thanks in advance

Hello,

Sorry to hear you are having issues. I have forwarded your problem/question to Stardock Support Team for their assistance. Please keep an eye on this thread for any updates. We appreciate your feedback and patience. Thank you.

Basj,

Stardock Community  Assistant

Hi Gigameister and thank you for posting.  

You said:

Could you clarify some specifics here?  Mainly:

1. "breaking whatever app i paste", meaning the copy and paste itself works, but the application itself will not after it is pasted?  And does copying and pasting text itself work?
2. Do you get different results with copying/pasting different destinations or file types (such as to/from Desktop, between local folders, or OneDrive)?
3. When you said, "it was fully working before", can you provide a complete description of how exactly these issues worked better before? And what version of Multiplicity was it? 
4. When exactly did it work better before?  Please note anything on your end that could have changed in that time, as these may be a factor.  

Other than these questions, generally as much information regarding the exact specific reproduction steps helps us to understand and attempt to reproduce your results.  Screenshot images and/or video uploads can also be included in your reply and are always helpful.

Best regards,

Adam McGuinness
Stardock Support Specialist

1: Meaning if i copy something on PC 1 and try pasting on PC2 (for example an URL on any of the browsers) the app receiving the paste just goes apeshit and crashes.
2. no
3. i formatted my pc 1 week ago and installed everything fresh, previously in the same version of win11 and multiplicity. this install is just not working.
4. it worked, now it doesnt. i was able to ctrl+c on either pc, hit the swap pc key and hit ctrl+v on the other pc. it worked for files, long clipboards, short clipboards. anything. now it does not. same exact setup.

i've tried multiple fixes available on your website, nothing worked. it did worked randomly for like 2 hours, then it borked and hasn't worked since.

When copying and pasting (or dragging and dropping) between PCs fails, the vast majority of the time this turns out to be a firewall issue.  

In this case, it sounds like firewall port settings may have been reset when you formatted the PC and reinstalled Multiplicity.

To see if there's a firewall issue, I can suggest following the guides below to see if they help.  Specifically, the MPPortFix.bat file is a simple way to help Multiplicity function properly if there's a firewall issue.

https://support.stardock.com/space/SHC/1345028118/Multiplicity+Ports

https://support.stardock.com/space/SHC/1287946260/Multiplicity+Connection+issues+101

Best regards,

Adam McGuinness
Stardock Support Specialist

When you say the app receiving crashes, do you mean say MSWord or Notepad crash themselves when being pasted into?