# Volume Render problem: "Can not execute simple algorithm without output ports"; other details about getting started

**URL:** https://discourse.paraview.org/t/volume-render-problem-can-not-execute-simple-algorithm-without-output-ports-other-details-about-getting-started/5074
**Category:** ParaView Support
**Created:** [August 11, 2020, 4:09am UTC](https://discourse.paraview.org/t/volume-render-problem-can-not-execute-simple-algorithm-without-output-ports-other-details-about-getting-started/5074 "2020-08-11T04:09:29Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Partth\_Laad](https://discourse.paraview.org/user_avatar/discourse.paraview.org/partth_laad/32/4699_2.png) [@Partth\_Laad](https://discourse.paraview.org/u/Partth_Laad)
#### Post date: [August 11, 2020, 4:09am UTC](https://discourse.paraview.org/t/volume-render-problem-can-not-execute-simple-algorithm-without-output-ports-other-details-about-getting-started/5074/1 "2020-08-11T04:09:29Z")

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Hello all,

I am quite new to using ParaView so I apologize if this is something trivial. I am transitioning from standard CFD software like Tecplot. My question is, when loading my data into the software, I can obtain all surface data/solutions from the CFD code (Gaspex). My problem is when I try to use the volume rendering, I am met with the following error:

ERROR: In C:\bbd\a2ca2c3a\source-paraview\VTK\Common\ExecutionModel\vtkCompositeDataPipeline.cxx, line 154  
vtkPVDataRepresentationPipeline (000002265C72FD90): Can not execute simple algorithm without output ports

For reference, I am using the recently nightly release/5.8.1 by downloading the Windows compatible 64 bit.exe file. I am running Win10 machine with 32 GB RAM, Intel Xeon processor E-2176M, and two graphics cards: Intel UHD P360 and Nvidia Quadro P2000 with Max Q Design.

Maybe I needed to unpack the zip instead of using the executable?

Also, I see many users use the MSI-MPI option or work through the command line as compared to the GUI. As someone who has traditionally used GUI based post-processing software, is there an easy way for someone to learn how to use ParaView this way and can explain where I can begin to learn how to do so? Is there any merit in working this way?

Thank you for your time and I am sorry if I have not presented this as a properly formatted post.