Technical Support for Jaksta Media Recorder

DVR Error

Asked by Andrew Lam @ 17 Nov 2017 23:11 / Views: 18

Just tried to do some screen capture with JMR DVR but error occurred.

It says:
Value cannot be null

Parameter name: Parent


No idea what is happening.  I tried to uninstall and reinstall but still don't work.

From Andrew Lam @ 17 Nov 2017 23:11

Try resetting your settings to their defaults.  Settings > Reset icon


Otherwise please provide debug logs as per

Ensure you turn on debug before performing what ever action is causing this error.

From CRS @ 18 Nov 2017 18:11

Thanks.  Now I'm OK to start DVR and watch the video I want to record, but the video captured is showing "Click to start Adobe Flash Player".  Any idea what to do?


From Andrew Lam @ 18 Nov 2017 18:11

Site requires the flash player, which chrome blocks by default so you need to enable it.  

Open the page in the DVR browser, click to start the flash player, start the video and then click record. 

What website is this?

From CRS @ 19 Nov 2017 12:11

It's a personal website showing its webcam online.

I'm fine to watch it with DVR browser, but not when I start capturing.

The sound could be recorded however

From Andrew Lam @ 20 Nov 2017 00:11


I will need access to the site to have a look and see what is going on.  Please email support AT with the sites url and authentication credentials.

From CRS @ 20 Nov 2017 08:11