# Demo doesn't seem to function in 4.6.1 **URL:** \ **Category:** PIX4Dmapper\ **Created:** [September 9, 2020, 12:02pm UTC](https://community.pix4d.com/t/demo-doesnt-seem-to-function-in-4-6-1/14478 "2020-09-09T12:02:17Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![marcio.dasilva](https://avatars.discourse-cdn.com/v4/letter/m/bb73d2/32.png) [@marcio.dasilva](https://community.pix4d.com/u/marcio.dasilva)\ **Post date:** [September 9, 2020, 12:02pm UTC](https://community.pix4d.com/t/demo-doesnt-seem-to-function-in-4-6-1/14478/1 "2020-09-09T12:02:17Z")
Gday, As part of a course we are teaching, we are using the demo project. A few of our students had 4.6.1 installed and a few of us had 4.5.6 installed. Those with 4.6.1 could not use the demo project and had repeated crashes after running initial processing (Rapid and Full). The processing would finish and a blank quality report would pop up but never load and eventually time out, leading to a crash. Our only work around was to have those students with 4.6.1 uninstall and re-install the previous version. Any chance someone could take a look at this? Has anyone else had this issue? Thanks, M ---
**Author:** ![joan.cano](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/joan.cano/32/1886_2.png) [@joan.cano](https://community.pix4d.com/u/joan.cano)\ **Post date:** [September 10, 2020, 7:42am UTC](https://community.pix4d.com/t/demo-doesnt-seem-to-function-in-4-6-1/14478/2 "2020-09-10T07:42:02Z")
Morning, what’s the graphic card of that computers? > **[Use of the GPU in PIX4Dmapper](https://support.pix4d.com/hc/en-us/articles/203405619-Use-of-the-GPU-in-Pix4Dmapper)** > >   > > Information:  > > > For more information about Hardware Components usage when processing with PIX4Dmapper: Hardware components usage when processing with PIX4Dmapper. > For more information regarding:... Regards ---
**Author:** ![marcio.dasilva](https://avatars.discourse-cdn.com/v4/letter/m/bb73d2/32.png) [@marcio.dasilva](https://community.pix4d.com/u/marcio.dasilva)\ **Post date:** [September 10, 2020, 8:00am UTC](https://community.pix4d.com/t/demo-doesnt-seem-to-function-in-4-6-1/14478/3 "2020-09-10T08:00:20Z")
Good afternoon, It occured on 4 different computers with 4 different graphics cards. One of them being mine that I use frequently for Pix4D, which has a NVIDIA Quadro RTX 3000. ---
**Author:** ![marcio.dasilva](https://avatars.discourse-cdn.com/v4/letter/m/bb73d2/32.png) [@marcio.dasilva](https://community.pix4d.com/u/marcio.dasilva)\ **Post date:** [September 10, 2020, 8:12am UTC](https://community.pix4d.com/t/demo-doesnt-seem-to-function-in-4-6-1/14478/4 "2020-09-10T08:12:24Z")
To be clear, the processing would finish. The quality report would generate and then it would freeze the program and force a crash. ---
**Author:** ![joan.cano](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/joan.cano/32/1886_2.png) [@joan.cano](https://community.pix4d.com/u/joan.cano)\ **Post date:** [September 10, 2020, 9:06am UTC](https://community.pix4d.com/t/demo-doesnt-seem-to-function-in-4-6-1/14478/5 "2020-09-10T09:06:58Z")
Do you have the latest driver installed, supporting CUDA 9.1? ---
**Author:** ![marcio.dasilva](https://avatars.discourse-cdn.com/v4/letter/m/bb73d2/32.png) [@marcio.dasilva](https://community.pix4d.com/u/marcio.dasilva)\ **Post date:** [September 13, 2020, 3:17am UTC](https://community.pix4d.com/t/demo-doesnt-seem-to-function-in-4-6-1/14478/6 "2020-09-13T03:17:43Z")
Yes, like I said above. The issue happened on 4 different computers with 4 different graphics cards and drivers. The issue isn’t with the hardware or its drivers. ---
**Author:** ![Fernanda\_Bosmediano](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/fernanda_bosmediano/32/323_2.png) [@Fernanda\_Bosmediano](https://community.pix4d.com/u/Fernanda_Bosmediano)\ **Post date:** [September 16, 2020, 11:15am UTC](https://community.pix4d.com/t/demo-doesnt-seem-to-function-in-4-6-1/14478/7 "2020-09-16T11:15:19Z")
Hi Marcio, Thanks for sharing this feedback with us. We informed our team and are investigating the reason why this could be happening. In this case, I recommend what you have been doing, to use Pix4Dmapper released version like Pix4Dmapper 4.5.6. We will update this thread as soon as we have more information ---
**Author:** ![marcio.dasilva](https://avatars.discourse-cdn.com/v4/letter/m/bb73d2/32.png) [@marcio.dasilva](https://community.pix4d.com/u/marcio.dasilva)\ **Post date:** [November 3, 2020, 3:36am UTC](https://community.pix4d.com/t/demo-doesnt-seem-to-function-in-4-6-1/14478/8 "2020-11-03T03:36:18Z")
Hi Fernanda, Do you have any update? ---
**Author:** ![Fernanda\_Bosmediano](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/fernanda_bosmediano/32/323_2.png) [@Fernanda\_Bosmediano](https://community.pix4d.com/u/Fernanda_Bosmediano)\ **Post date:** [November 3, 2020, 8:18am UTC](https://community.pix4d.com/t/demo-doesnt-seem-to-function-in-4-6-1/14478/9 "2020-11-03T08:18:06Z")
Hi, We are checking into the issue but could not find a solution that would solve the issue 100%. Some users selected a graphics card as the preferred graphics processor for Pix4Dmapper, and it worked. To do this, please follow the instructions of this article [How to set the NVIDIA graphic card to use with Pix4D Desktop](https://support.pix4d.com/hc/en-us/articles/115000264843) Could you please also try this from your side? Best,