# DMA Application is not working in Jupyter **URL:** \ **Category:** Support\ **Created:** [June 4, 2022, 1:59pm UTC](https://discuss.pynq.io/t/dma-application-is-not-working-in-jupyter/4305 "2022-06-04T13:59:00Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![marioruiz](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/marioruiz/32/2177_2.png) [@marioruiz](https://discuss.pynq.io/u/marioruiz)\ **Post date:** [June 8, 2022, 4:23pm UTC](https://discuss.pynq.io/t/dma-application-is-not-working-in-jupyter/4305/4 "2022-06-08T16:23:04Z")
I am going to do the same comment as I did earlier. > [@TLAST Issue](https://discuss.pynq.io/t/tlast-issue/4321/8): > > Hi @Nagendra, These type of questions are outside of the scope of the PYNQ support. I suggest you familiarize yourself with AXI4-Stream and how the DMA works. As you will learn from the link below, TLAST signals the last byte of the stream so it cannot be asserted all the time. A good starting point here [How-AXI4-Stream-Works](https://docs.xilinx.com/r/en-US/ug1399-vitis-hls/How-AXI4-Stream-Works) You can also review Cathal’s tutorial [Tutorial: using a HLS stream IP with DMA (Part 1: HLS design)](https://discuss.pynq.io/t/tutorial-using-a-hls-stream-ip-with-dma-part-1-hls-design/3344), you can add ILA in that design so you can learn how it is working. … Mario --- _[View the full topic](https://discuss.pynq.io/t/dma-application-is-not-working-in-jupyter/4305)._