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> Fetch the complete documentation index at: https://docs.ntop.com/llms.txt
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# The simulation results window isn't appearing

## Issue:

I can run my simulation block, but once I get the results the window to view the properties doesn't appear.

## Cause:

This is caused by a List input being entered into the Simulation block.

## Solution:

* * Find out when the List appeared. It will have a (#) behind the block name and the List symbol will appear on the icon.
    * Go to this block and open up the Info Panel.
      * Go to Properties.
      * Scroll down until you find a Chip of the same color as the block with a \[0] behind the name. Use this as your input. This input is the same as the block but doesn't have a List attached to it.
    * Input the Property chip into the next block.
    * You may receive an error 'Invalid Input Type'. This is expected since the block is set up to receive a List.
    * Select the Block Icon and choose the option that shows up in the drop-down that has the same name as that block. This will reset the block to not allow List inputs.
    * Do this for all of the blocks that have a List icon and they will run as normal, allowing the Simulation Results window to appear.

![The gif shows how running a simulation as a list prevents the results from appearing. Once the simulation is converted to a single item and not a list, the results appear as intended.](https://files.learn.ntop.com/help-articles/structures/360101150573.png)

## Keywords:

*analysis simulation list properties design stress strain results not up appearing show HUD don't directional icon issue*