decimal App Documentation

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====== p.d Support ======

Common issues and resolutions for when using p.d.

===== Remote Desktop Issues =====

Using p.d over Remote Desktop can lead to a few issues if the host computer is not configured properly. Below are the most common issues and how to resolve them when using p.d in this scenario:


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==== LoadLibrary failed ====

  * **Error:** "LoadLibrary failed with error <#>: The parameter is incorrect".
    * Note: the <#> may change, but in our experience the issue is typically error #87 or #126.
  * **Explanation:** The work station video drivers are not loading properly due to a RDP (Remote Desktop Protocol) connection. p.d requires OpenGL, but many older graphics drivers to not support OpenGL over RDP.
  * **Solution:** 
    - Option 1: Have the user login at the actual work station an not use RDP.
    - Option 2: Update the video drivers. Recent (~2020) video driver updates may have included support for RDP OpenGL acceleration. In the past only workstation level graphics cards (e.g.: NVIDIA Quadro) supported OpenGL over RDP, but now other graphics cards (e.g.: NVIDIA GeForce) have been updated to also support this.


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==== Unstable p.d crashes AND/OR Missing CT Images and Structures ====

  * **Error:** p.d may crash while performing specific tasks (e.g.: designing a bolus) and/or the CTs and structures are not displayed.
  * **Explanation:** The work station may contain outdated libraries or drivers that conflict with the p.d library requirements.
  * **Solution:** 
    - Option 1: Put p.d into Windows 7 compatibility mode. Open p.d and from the main menu open the "About p.d..." dialog and select the option to "Set Windows 7 Compatibility Mode".
    - Option 2: Right click the p.d executable, open the Properties option, select the  Compatibility tab, and set the executable to run in Windows 7 compatibility mode.


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